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Video tags
Subtitles
Russian
00:00:01
learn C plus plus with you for everything00:00:03
just one video, that is, we will be with you00:00:05
parse variable conditional operations00:00:07
cycles and many other things that00:00:09
present in C plus plus language00:00:10
so that after this you can say that00:00:12
you are a plus plus developer00:00:14
in this video tutorial I will work on00:00:16
Mac if you work on Windows then this00:00:18
does not pose any problem, that is,00:00:20
the code will be exactly the same here and there00:00:22
it will also be executed in the same way00:00:24
Accordingly, you can work on Windows and00:00:25
repeat after me I will work in00:00:28
such a program as xcode it00:00:29
specially designed for poppy if00:00:31
you are on Makita pension midges download and00:00:33
work not here there is a development environment00:00:34
from si plus plus if you are on00:00:36
windows then it will be wonderful for you00:00:38
the program is visual studio00:00:40
Accordingly, I will leave a link to00:00:41
download this program in the description00:00:43
video you can basically just00:00:45
download this program but if you00:00:47
don't want to bother at all00:00:49
about various programs then I will leave00:00:51
another link in the video description00:00:53
this is an online compiler in which you00:00:55
you can enter your C plus plus code and00:00:57
accordingly it will be here00:00:58
process the question click later00:01:00
button wounds and this is also the same00:01:02
will be for you and what is a text editor00:01:04
visual studio or for example xcode for00:01:06
me also visit the site and Cyprus00:01:08
gear dot com link to this lesson at00:01:10
the site will be in the description of the video here you00:01:12
you can find many homework assignments00:01:14
other useful things for this video00:01:16
roba so you will like the link here00:01:17
in the description now I will create a new project00:01:19
you can make the cake for example00:01:21
visual studio or their fx hadise wanna00:01:23
make that is, crits00:01:24
xp xcode project then we select come00:01:27
on line tool that is, the pants themselves00:01:29
everyone calls a simple tutorial app00:01:31
this project will be called our tutorials00:01:34
they'll call it a sandwich, I choose it as C Plus00:01:36
plus we, accordingly, there’s nothing more here00:01:38
no need to do location download00:01:40
it suits me and now we have a project00:01:42
I'm already completely ready, an error has popped up00:01:44
but it doesn't matter at all that she is now00:01:46
it's highlighted here, let's go to our00:01:48
main file this n.00:01:50
and these pipettes are just extensions00:01:53
plus plus respectively to any file that is in00:01:56
which has cat si plus plus we must00:01:59
add extension . si pi pi00:02:01
what's going on here first of all iodine00:02:04
some comments that we absolutely00:02:06
unnecessary and we can just delete00:02:08
Next comes connecting the library:00:02:10
one of the main libraries00:02:12
which allows us to perform enormous00:02:13
number of different operations in our00:02:15
let's all write clean code00:02:18
sheet so I'll delete everything and start again00:02:20
I'll connect a library for example00:02:22
airstream library and streams on00:02:24
mobile helps us display for example00:02:26
some information you console either00:02:28
read this information accordingly00:02:30
this is one of the key such libraries00:02:32
then let's connect some more00:02:33
several libraries just so we have00:02:35
somehow it was not let there be a library00:02:37
steering will allow us to work with00:02:38
strings and library in cloud vector00:02:41
will allow us ups in cloud that's how it is00:02:45
is written vector will allow us to work with vectors00:02:48
next I have to write a new function00:02:51
this function is main00:02:52
and this is the main function in the plus + version00:02:54
thanks to this function we can generally00:02:57
run the program if in any00:02:59
The project C plus plus does not have the made function00:03:02
accordingly, do not start the project00:03:03
because at the start of the project it is written00:03:06
in C plus plus00:03:07
the main function is executed and everything is out in00:03:09
this function is executed if not then not00:03:12
nothing and you must perform the functions00:03:14
be sure and necessarily key00:03:16
syllable liquor and return the value 0 .00:03:19
when we do a bunch of code here00:03:21
will be and the function will reach the word liquor00:03:24
it will return the value 0 it will say00:03:26
to the compiler that the function ended with00:03:29
and result 0 this result means00:03:31
what is a function what is the whole program00:03:33
ended correctly, that is, no00:03:35
errors resulting from program execution00:03:37
didn't arise now let's deduce that00:03:39
or you console I can use for00:03:41
this is the SEO operator here I go00:03:44
I’ll just write down a certain word for example00:03:45
hello world00:03:47
that is, they usually always start writing like this00:03:49
any language asked at the gate00:03:51
matching we did that too in the end00:03:53
added online this means it's over00:03:55
lines and transition to a new one but we have00:03:57
whether there were several errors, the point is00:03:59
what do we need to use00:04:01
namespace std00:04:02
I can solve this in two ways then00:04:03
there is I can register with t d:: in the light00:04:07
but write the same thing here with td00:04:09
:: English then we don’t have any mistakes00:04:13
everything will be poor, but so is everyone00:04:15
once writing it's boring it's long it's even00:04:17
it can't be said correctly so let's00:04:19
you and I just turnkey it we will00:04:21
use namespace std this way00:04:24
I have already00:04:25
don't write std everywhere here and just00:04:28
write online CNN we will continue to search00:04:30
write00:04:31
Well, and this is the main thing, everything will work00:04:33
press the wound button here00:04:35
button you00:04:36
visual studio is basically the same there00:04:38
there is a button somewhere that's why that's all and00:04:42
we see that everything was done for us00:04:44
hatched successfully hello world00:04:45
and the program ended with code 0 well00:04:48
then here it is 0 returned00:04:49
accordingly there are no errors00:04:51
arose, it means everything is correct with us00:04:52
now let's talk about changes in00:04:55
C language plus plus variables is a certain00:04:57
cells you yes we can write down00:04:59
information and then take this information00:05:01
use it whenever you want00:05:02
This is how variables are written in C language00:05:04
plus plus initially we need00:05:06
specify a data type for some00:05:08
specific variable exists00:05:10
several data types for example we00:05:11
let's look at the very first one with you00:05:13
data type is char you data type char we00:05:15
we can only fit one00:05:16
any symbol, that is, we write00:05:18
initially data type00:05:19
then we have to call ours somehow00:05:22
change, for example, change cannot00:05:23
start with and numbers00:05:25
also you don’t need to write in them00:05:26
initially the first character and indeed00:05:28
no such symbols and it should be like there00:05:29
dollar ampersand and the like is the same00:05:31
the most ordinary normal00:05:33
names should be given, I’ll name this as an example00:05:35
sim and further I can and you this variable00:05:38
immediately set any value to00:05:40
for example, I’ll ask that it will be simple here00:05:42
the symbol is just a letter and accordingly here it is00:05:45
in this way we created change with you00:05:47
in the future we can refer to this variable00:05:48
access the seals example and more00:05:52
just output our variable 700:05:54
Accordingly, I simply write 7 I can continue00:05:56
again, register online so that00:05:58
everything was then a new line for us00:05:59
Now, if we run this all, we will see00:06:02
that we will simply have in the console00:06:04
hello world displayed00:06:05
well then this is our our variable00:06:07
respectively, you and I with the variable00:06:09
here we figured it out further what else00:06:11
types exist change it was a type00:06:13
a chart that we can record on00:06:14
specifically one speech symbol further we00:06:17
we can create bull as a variable00:06:19
which takes two values either true00:06:21
or false example I can call this00:06:23
change from quark and for example give it00:06:26
meaning how difficulty it works00:06:28
for example, it gives that is, here it’s just00:06:29
we need an eye of meaning but maybe not00:06:31
work or can work00:06:33
true or false respectively00:06:34
this is the second data type, the third type00:06:36
data is00:06:37
for example int int we can write00:06:39
any integers for example this is one00:06:41
two three four and so on that is this00:06:43
ordinary whatever the simplest numbers are00:06:46
in addition there is long long int in00:06:49
long int we can just put00:06:51
greater value than just int itself00:06:54
for example if00:06:55
int I can't fit several in there00:06:57
there are quintillions of millions, I don’t know, yes00:06:59
then damn kent I can have something like this with me00:07:01
place the number in this itself00:07:03
C programming some programs00:07:05
write difficult things there, or rather it’s not00:07:07
very often used brittle and therefore00:07:10
that he has a really big range00:07:11
for example, if you write large good ones00:07:13
such projects for us or something like that00:07:15
spirit of Talon King for example there it is often00:07:17
may not need large ones00:07:18
number ranges00:07:20
but this is the principle of lonking I can’t come here00:07:21
write and at five we get the name by the way00:07:24
variables do not need to be repeated00:07:26
because it was not going to be easy00:07:27
overlap each other here's one for us00:07:29
I can put it here in the future00:07:31
simple and the number 23 is ok but it will be00:07:34
not really smart because lon canton turns more00:07:36
it requires more memory so00:07:39
accordingly it would be easier00:07:40
use for something like this just int to00:07:42
for example, or use short int for00:07:45
ours in our case because we have00:07:47
here these are very small numbers and00:07:49
short int is exactly what is used for00:07:51
Odessa is so small in numbers, well00:07:53
for example, ours in the case of 120 years of Odessa00:07:55
we have small numbers below00:07:57
there is a fleet data type if we can00:08:00
write only some specific ones00:08:02
numbers for example there are 12345 then we would have a fleet00:08:05
we can write an example there for example00:08:10
favorite number there and for example it will be00:08:14
equal to 2.35, for example, up to 2.35 we can even00:08:18
at the end of f it is not necessary to get it00:08:20
example effect means that float00:08:22
data type lot but this may not be00:08:24
you can deliver and write it down without00:08:25
numbers letters to letters00:08:28
that is, we would consider the fleet to be recorded00:08:30
float two 3.3500:08:34
1.22 there for example or there are some00:08:36
huge numbers up to that, for example 12500:08:39
thousand. 345 for example one was talking about this00:08:42
spirit also exists double double it's like00:08:44
basically breaking, that is, it doubles00:08:46
its range is greater than that of float00:08:48
accordingly, we can simply numbers00:08:50
write more here for example about food00:08:52
some kind of test let it be called00:08:55
and here there is 0 .00:08:57
and there will be a bunch of some symbols00:08:59
absolutely fine it will work00:09:00
correctly00:09:01
besides, we can also create00:09:03
For example, I can write these changes00:09:05
pint next call her oh00:09:07
and then in other lines assign them00:09:10
values for example to the next line00:09:11
I can also assign its value00:09:13
create constants constants00:09:15
this is something that will never happen again00:09:17
change for example if I write a word00:09:19
const Next I will write, for example, words of words00:09:22
let it be and I will indicate that this is an api00:09:25
the value of pi here is for example 3.1400:09:29
Well, there I no longer remember the numbers and00:09:31
accordingly, that’s enough in principle, that is00:09:33
constant we cannot further and00:09:34
death if variable here I am00:09:36
assigned the value test well, this one00:09:38
change with assign values and continue00:09:39
I can change this value to . n 23.00:09:42
34 for example it will be absolutely00:09:45
correctly, then I can display it all in00:09:47
the console is for and I can’t do it anymore00:09:49
do it because it would be a mistake00:09:51
example, I want to put everything here00:09:52
value 3 then in principle it will indicate00:09:55
error as you see now let's00:09:57
let's work on math00:09:59
operations on variables first00:10:01
I will create two variables i.e. it will be00:10:03
we have one and separated by commas I will create more00:10:06
one change for us 2 respectively like this00:10:08
you can do it and I do just that00:10:10
please use it further I'll try00:10:12
user so that he is the only one for us00:10:17
for example, this is how I’ll write it further00:10:19
I will ask the user to do this00:10:21
really led00:10:22
for this I use the seedlings operator00:10:24
Allah he deduces sen he is the opposite00:10:25
receives information and writes what00:10:28
variable I write it all down I00:10:29
I write one further into the nam variable00:10:32
I'll copy this basically because I00:10:34
I also want him to lead us 200:10:35
do it accordingly and now I00:10:38
I can produce various00:10:39
mathematical operations for example I can00:10:42
create another integer let's create it00:10:44
I'll put the rolls here and I'll call it00:10:47
passed by00:10:48
this is what he will do for example00:10:50
section will take value to 100:10:53
plus us 2 accordingly it will be00:10:55
adding these two numbers for example00:10:58
if I then try to bring it to00:11:00
screen00:11:01
then we get the following let's go here00:11:03
I'll describe the blast from00:11:05
and here we’ll just add for example00:11:09
additional results and basically that's all00:11:11
let's compile and see what comes out00:11:14
this is what we got so for a start00:11:16
he see as an intern one I drive for example00:11:20
23 then we get 234 and now we get00:11:23
result 57 additional variables00:11:26
can subtract multiply divide receive00:11:28
remainder when dividing, for example, I ran00:11:30
program let's enter the first number 1200:11:33
On the 2nd I will have 23 for example and if00:11:36
look, they're not all that strong00:11:37
all these conditions are met correctly00:11:39
and the remainder of the division is also satisfied00:11:41
absolutely correct but look at what00:11:43
there is also a little thing here when00:11:45
12 divided by 23 then we get the result 000:11:49
why does this happen the thing is that00:11:51
us that all these changes are ours00:11:54
are them accordingly he cannot00:11:56
write 0 there.00:11:57
and then there is some number or 1.5 it00:12:00
can't make them into a fleet type00:12:02
accordingly how we do it00:12:04
we can solve this problem with you00:12:06
we can solve this as follows:00:12:08
for example, where the divisions are, I’ll add one more00:12:10
a new variable let it be well00:12:13
let it just be called rez00:12:15
nothing more here00:12:16
I will describe now where do we have division here?00:12:18
I will not record the divorce from00:12:20
variable once and now I will00:12:22
use00:12:23
cast these values to fleet type00:12:26
accordingly we will have this now00:12:28
like the fleet we will also have it like but00:12:31
now we divide the fleet by the fleet we get00:12:33
again, the fleet is here and we are taking it out00:12:36
just on the screen so we get the result 0 . 520 and00:12:40
went further there accordingly00:12:42
we are really a fleet, we take out the floor00:12:44
and then everything works correctly for us00:12:45
in addition we can produce00:12:47
various mathematical operations on00:12:49
the most changes, for example, if we00:12:51
there is a variable let it be for us00:12:53
one and to this variable we want00:12:56
add a number, that is, we have one plus00:12:58
for example there is 23 we of course can and00:13:01
so write it all down absolutely00:13:02
correct but we can shorten we can00:13:04
add this plus equals 23 means that00:13:07
to this variable we add the number 2300:13:10
we can also subtract this number we00:13:11
we can multiply00:13:12
divide this number and get the remainder00:13:14
when divided by the same number00:13:16
that is, it turns out we take the same number00:13:19
he has the rest of his definitions for this00:13:21
here is the number according to this00:13:23
In this way this is additionally possible00:13:24
implement in addition if you want00:13:26
add one to any number00:13:28
example + 1 then you can do more00:13:30
It’s easier just by writing + + and00:13:33
accordingly this means that00:13:34
adds one to this variable or00:13:36
if you write minus minus then this is00:13:38
will mean that you take away one00:13:40
this variable now let's00:13:42
Let's look at conditional statements with you00:13:44
thanks to the conditional operator we can00:13:46
perform any action in00:13:48
depending on what values we00:13:50
got an example let's you and me00:13:51
let's create a new change it will flow and00:13:54
we wouldn't get this HS from00:13:56
user, that is, he would enter them00:13:57
we need this change accordingly further I00:13:59
I want to check this change, that is, I00:14:01
writing00:14:02
iv h if she something our when00:14:04
variable h then we write some00:14:06
condition that is if our thing is00:14:09
more than 18 for example thanks00:14:11
to this we indicate that we also00:14:13
we can indicate that, for example, less is less00:14:15
either equal to greater than or equal to this00:14:18
greater than or equal to simply equal to or00:14:21
it doesn’t matter that all of them are here, conditional00:14:23
operations in our case I need00:14:25
just more if more than 18 then I00:14:29
let's just write something like this00:14:31
What00:14:34
avoid here there is some mistake there00:14:38
beat me up for it, so let's just give the rating00:14:42
I'll put everything else here00:14:43
I won’t additionally record online00:14:46
ok that is, if we add more than 1800:14:49
further I can additional condition00:14:50
enter 1 is not mandatory but00:14:53
I can write that is lcf if h00:14:56
will be equal to 18 for example then I let's00:14:59
I’ll write research, I’ll just copy it00:15:02
and the example which is equal equal in my opinion00:15:07
it's spelled like this, that is, your age00:15:09
equals 18 and if00:15:12
and I can still provide additional conditions00:15:13
add which is executed by00:15:16
default if all other conditions are not00:15:17
executed, that is, for example, this is lc00:15:19
if this condition returned a fall then00:15:22
is not true it is also00:15:25
It’s not true that all these are executed by lc00:15:28
el-si-el silver they are00:15:29
optional ones you can do without them00:15:31
just write to them and it's all done00:15:33
there will be a check but if we want we can00:15:35
add more lc and if we want we can00:15:38
again you can add a little lc00:15:40
add wasps just iv that is like this00:15:42
write it down and it will be absolutely00:15:44
correct and correct lc is executed in00:15:46
otherwise, if everyone else00:15:48
checks have not been verified essentially yes00:15:51
that is, it is no more than 18 but not equal00:15:54
18 which means she is something else so I00:15:57
I can still write that the speech is from us00:16:01
this means your age is less than 1800:16:05
For example, if you run it all and enter00:16:08
number but any absolute number is now only00:16:11
but here it will load, using my example00:16:13
I’ll write down the number 17 then the speech is cut up then00:16:17
that is, your age is absolutely less than 1800:16:19
all checks were correct and it's simple00:16:22
great besides I can do these lc00:16:24
ip here add a huge amount00:16:26
I can add 11 more for example if I00:16:28
I will if the age is 17 then I will00:16:32
I’ll write, for example, that it’s yours00:16:34
age hurts 17 respectively not really00:16:36
I changed a lot of things but still here00:16:38
you can of course write down whatever you like00:16:40
only checks what kind of00:16:43
only you can always insert the code in these00:16:44
the checks themselves, that is, for example00:16:46
I can put some more here00:16:48
check for example if my age is00:16:50
17 here and in addition I will create one more00:16:53
change it will be happy variable00:16:55
which by default will be equal to00:16:58
difficulty let it be true immediately and00:17:00
and in principle I will check for it00:17:02
how can I check for bully00:17:04
that is, these are the variables I can00:17:06
just write is happy equals true this00:17:08
will mean that if happy is true00:17:10
then I will output, for example, but let me not00:17:13
this text will display the text00:17:15
the next one is now its mode and I’ll paste it here00:17:18
can't you you a happy that's basically yes00:17:23
Let's just write what's happening here00:17:26
look we are checking00:17:28
we if our age is 17 nights00:17:30
let's go into this whole check and into this whole00:17:32
code in this whole body00:17:35
checks that's what we check here if00:17:38
is happy equals true then we will be00:17:41
just display something like this on the screen00:17:44
that you are happy00:17:45
if he doesn’t work, then this is a test00:17:49
will not work and will be executed accordingly00:17:51
just this one line of code why00:17:53
it will be fulfilled because it is not00:17:54
refers to this condition she she does not00:17:56
were poked does not affect the meaning of this00:17:58
conditions for this line of code00:18:00
why didn't I finish it here?00:18:02
brackets the thing is that when we have one00:18:04
line of code for example there are more of us here00:18:06
one line of code to install with us too00:18:08
there was one line of code on there I00:18:10
I just already added these brackets but if00:18:12
us one line of code then we can not00:18:13
putting these parentheses will do it00:18:15
absolutely normal now one more thing if00:18:18
we check by type so00:18:20
the variable is equal to labor there then we can00:18:22
I can write it all down in a simpler way00:18:24
write to them and the diagram, that is, if00:18:27
our change how to paint is like this00:18:29
we can say this means that we00:18:31
just checking is happy equals true00:18:33
this is the equivalent because we00:18:35
just wrote if I want to check00:18:37
I just bet on the fact that she falls00:18:39
sign ! pass it on00:18:40
and this variable and we are already checking00:18:42
but is it equal to canvas, that is, it was00:18:45
would be equivalent to falls that is, is it equal00:18:48
this is a variable the variable is set to false here00:18:51
accordingly, let me write this00:18:52
now the meaning of the post is again yes that's it00:18:55
Let's compile and try to write here00:18:57
the number is 17 and we see that you were engaged00:18:59
exclusively this line because00:19:01
that this test failed00:19:02
Accordingly, nothing came out here00:19:04
if I wrote here that we have a corpse00:19:06
then accordingly enter here again00:19:08
17 we already have two lines displayed and a00:19:11
happy00:19:12
and you're 17, that's all00:19:15
great besides we can00:19:17
combine several checks for example00:19:19
if we want to check here not only00:19:22
that these are more than 18 but still some00:19:24
we will put an additional check00:19:25
we can write it like this, that is, it means00:19:27
what if h you are more than 18 and ours00:19:32
2 conditions for example is happy that is if00:19:35
age will be over 18 and we are still00:19:38
supplement00:19:39
funny then just do this00:19:41
here is a condition for example if we have at least one00:19:43
of these and at least one of these conditions00:19:45
will return the canvas but it still doesn’t work for us00:19:47
will be in plan00:19:48
this test will fail00:19:50
for example I return the values I set00:19:52
value 17 and as we see again too00:19:55
what happened is we didn't check00:19:57
it worked because we don't have a speech00:19:59
more than 18 if I bet00:20:01
for example, we will already have 19 o'clock then how00:20:04
since this whole test went like this00:20:07
true because we both have both conditions00:20:09
are true, that is, it is a corpse and00:20:12
this is a corpse if I want to check for that00:20:15
so that one of the conditions is 3d00:20:17
I can put it or does this mean something00:20:20
this condition must be true either00:20:23
this condition must be true then00:20:25
the whole body is performed this this this00:20:27
conditions accordingly if I still00:20:30
I’ll run it once and now I already have in mind the number k00:20:32
example 17 then we get the following:00:20:36
speech and speaker at the why because summit00:20:38
this is fall this is not tested for this00:20:41
passed the test because it's a corpse here00:20:44
and accordingly to us and when we become00:20:45
or do we need at least one00:20:48
go to the condition was with the value true00:20:51
such additional checks we00:20:52
we can put a bunch here, that is00:20:54
enter even more and more of these00:20:56
checks for various changes, etc.00:20:57
similar there is another conditional00:21:00
operator it's called candles, it's written00:21:03
as follows, switch is written here and00:21:05
then a case of some condition is written00:21:07
so first of all, let's have some more00:21:09
let's create one variable it will be for us and00:21:11
I'll give it a value of 12 for example00:21:14
now you switch00:21:15
I write a variable that I will00:21:17
check I will check the variable on00:21:19
I will check for certain values00:21:21
example case 1, that is, the first case is me00:21:23
I check if it is equal to one then00:21:26
I will fulfill the following condition00:21:28
In addition, this case requires00:21:30
write break so that we can00:21:32
but this is an example, these are the brackets for00:21:35
so that we can understand in order00:21:37
so that the compiler can understand where00:21:38
ends here is the data in case given00:21:40
check because if it's not00:21:42
it's easy to register00:21:44
the following will be executed00:21:45
cases that means here I am just when00:21:48
So I check if, for example, it’s ours00:21:51
the variable will be equal to one then00:21:53
perform the following operations for example00:21:55
seoul and here I'm just one of us00:21:59
example and nothing more to add here00:22:01
I won't go any further, I can do it here00:22:03
put as many of these as you like00:22:05
okay, but there is a case 2, for example, we are out of 2000:22:08
basically I'm just here already00:22:09
I’ll just make it for us out of 3, so here’s what to do next00:22:12
Of course you can add a bunch here00:22:14
various code and place all this code00:22:16
before the word take because break it00:22:18
indicates that all this case is completed00:22:20
7 that is, for example, for us it will be equal to00:22:22
three that means we're coming here00:22:24
he checked that she was not one not two00:22:27
here are 3 yes it's really her00:22:29
he executed this line of code and exited00:22:31
from here it's all over, for example I00:22:34
also exists, remember we are with you00:22:36
just wrote lc this is also00:22:39
there is a default, that is, it is something00:22:41
value that is fulfilled by00:22:42
by default for example here let's give it00:22:44
myself too, just one line for example00:22:47
here I’ll just write what we’ll have00:22:49
us from a but he because for example I00:22:52
Odessa residents don’t know about her default, maybe not00:22:55
write this default value which00:22:57
you can add or not add00:22:58
for example if you don't have any00:23:01
values about which you need to add00:23:03
default if all the main ones are from and not00:23:04
worked the default maybe not like that00:23:07
example, if all this is allowed, then we have00:23:09
the next one will be completed for us from 30+00:23:11
programs there further in one line00:23:13
registered because I didn't add00:23:14
here online that is basically here00:23:16
it was all very very simple00:23:18
in addition there is also00:23:20
simplified verification form for example00:23:22
let's create an int bull for them00:23:26
oh I'm sorry and I wanted to create this00:23:28
bull and sports example I'll call her and she00:23:32
will be equal to the following for example I'm here00:23:34
I check for some immediate condition, for example00:23:37
if 1 is equal to one then we00:23:41
we put the work in principle here00:23:43
otherwise we put falls that is what is here00:23:45
happens initially we write the conditions00:23:47
then we put a question mark and write00:23:50
if labor animals when if this condition00:23:53
there is no truth when this is done00:23:55
if it is not true then it is executed00:23:58
this is according to my case this00:24:00
will just be displayed just will be delivered00:24:03
destination and swarg true to be00:24:05
placed besides because here00:24:07
the broth is used basically I just00:24:09
I can write 1 is equal to one and Anapa00:24:12
write here or it’s truly pathetic00:24:14
I was about to report wow better00:24:16
for example int will be here again for us00:24:18
for example if 1 is equal to one started in the wrong place00:24:22
write who we are for example if 1 is equal00:24:24
to one then we set the value 12 otherwise we00:24:27
set the value to 23 examples then00:24:29
in the same sense and even more so00:24:31
accordingly, and so simple00:24:33
simplified form of checking for conditions00:24:35
some now let's talk about arrays00:24:37
Maxim and we can put a lot00:24:39
information can basically interact00:24:40
with this information in order to00:24:42
we need to create an array00:24:44
again, specify the data type here00:24:46
the same types as for variables then00:24:48
there is in the double charm and the like00:24:51
for example I'll just create00:24:52
for example int array with data type and00:24:55
then I have to call him whatever you want00:24:58
for example I'll call it00:24:59
and ray because from English and Wright00:25:00
the mass further I have to put these00:25:02
square brackets and basically indicate00:25:04
number of elements in this array00:25:06
example my elemi in my array would be00:25:08
just four elements00:25:10
accordingly, in this way I created with00:25:12
you array it is still exactly the same as00:25:14
you and I have created changes and so far00:25:16
we don't call for no value, it's just00:25:17
dummy here everything is the same for that00:25:20
to add some value to00:25:22
this array00:25:23
I take this raid array by name further00:25:26
old square brackets and indicate00:25:28
index of the elements we want00:25:29
write the value in the array from the index00:25:32
starts from zero, that is, the first00:25:34
element is the second element zero00:25:36
element is the first element and so on00:25:38
further, that is, 0 1 2 3 we only have00:25:41
it turns out three elements 4 elements as00:25:43
there is no such thing because we start with00:25:44
zero countdown00:25:46
respectively next to first00:25:47
element something to put I just00:25:49
I set raid 0 and it is listed here for example00:25:51
the number is 23 because we have an integer00:25:53
data type is inject and I can only read00:25:56
write integers 2313 and so on00:25:59
if I had indicated that it was in words, for example00:26:01
then I could write it down to 23.20 for example00:26:05
now how to work with all this again00:26:06
the same as with a regular one as with a regular one00:26:10
variable, that is, we simply take again00:26:13
food of the seas00:26:14
next we indicate we will set square00:26:16
brackets specifying which element we want00:26:18
For example, I want to bring it up in my case00:26:19
output the first element because it is like00:26:21
times so many other elements are recorded00:26:24
since there is no more, let's launch the program00:26:26
and let's see what we have00:26:27
it worked and we will basically get it00:26:29
just show the number 23 on the screen. 23 that is00:26:34
really what we wrote down is00:26:35
output, in addition, arrays can also be00:26:38
initiate differently, that is, to00:26:40
for example, let's create more00:26:41
one array00:26:42
it will be called simply or let in00:26:44
we will have three elements00:26:46
just and we can do it right away00:26:48
project that is, write down everything00:26:50
absolutely here values for example 2356 and00:26:53
letting in 12 will be like this we00:26:55
immediately wrote down all the values in it00:26:57
three elements and now again we00:26:59
we can discuss working with them normally00:27:00
besides, you and I wrote one-dimensional00:27:02
arrays can be written two-dimensional 300:27:05
three-dimensional and so on, respectively, in00:27:07
what will be the difference between them if one-dimensional00:27:09
array it only has meaning in itself00:27:12
any numbers there for example or this00:27:14
some symbols and the like00:27:16
two-dimensional array00:27:18
it consists of arrays like00:27:20
look, we will have an array00:27:22
are 1 array consists of three00:27:25
elements and already the second array every year00:27:28
massive inside this array will be00:27:29
consist of two elements what is it00:27:31
means for example here we had00:27:32
number 2300:27:33
in our case, these will no longer be numbers, but00:27:35
some other array and this array00:27:37
consists of two elements, for example 231200:27:40
the next element is exactly the same00:27:42
him too this is also an array and he also00:27:45
consists of two numbers from two elements00:27:47
Bernini numbers are just elements here00:27:50
maybe there could be completely different ones00:27:51
values for example 45 78 and the third element00:27:54
absolutely the same thing, that is, a cave00:27:57
I’ll close this, that is, for example, the 67th here00:28:00
three for example all00:28:01
so we created with you00:28:03
a two-dimensional array is a three-dimensional array00:28:05
when still in place of these00:28:06
there are still other massive ones that are already00:28:08
we're going too far ahead00:28:10
three-dimensional mass is no longer so common00:28:11
used even more or less on00:28:13
three-dimensional is real so it hurts me00:28:15
rarely used world 400:28:17
especially since it’s like this with them now00:28:20
working with them is very easy00:28:22
absolutely the same array just now00:28:23
instead of one index here, for example, 000:28:25
I indicated yes and that’s kind of what I’m saying00:28:28
first array I must also00:28:29
show the second array which we00:28:31
let's address that is, initially I00:28:33
accessing the element at index 0 is00:28:35
this is our element and in this element00:28:38
I also take it into the array and I also take it into the array.00:28:41
I take another element here too00:28:43
everything starts from scratch without counting, for example I00:28:45
I'll put a 1, it means that I00:28:46
Initially I take the zero element here00:28:49
all and then I take the first element by00:28:51
the first index yes that is00:28:52
accordingly, this is the one we will have00:28:53
element if this is all try to display00:28:55
then we will really get00:28:57
console number 12 here it is displayed00:29:00
this way you can work with arrays00:29:02
in their si plus plus00:29:03
now we will create a loop and00:29:05
initially we will work with a loop00:29:07
for and in this cycle we place our new00:29:09
change oh that is, we initially00:29:11
indicate what date we all start from00:29:14
that is, and initially we will have equal00:29:16
zero we are all this whole cycle will be00:29:18
work until it is less than 10 then00:29:21
there while she is there 1234 she will be this00:29:25
the loop will run00:29:26
and the third parameters we will indicate that we are with00:29:28
each iteration00:29:30
we will increase ours and ours in our change00:29:33
oh per unit respectively there are 1 of us00:29:35
cooperation it will be 1 next it will be00:29:37
byte so further example I will output00:29:39
just on this screen this is our value and00:29:42
and accordingly we will see what we have from00:29:44
zero to nine all all the numbers will be00:29:47
the battle console has been removed from the year they are from zero to00:29:49
nine absolutely all withdrawn00:29:51
accordingly, what if I write for example00:29:53
here is also the same as their conditional ones00:29:55
operators, for example, if we write here00:29:57
greater than or equal to there debo greater than or00:30:00
equal less or equal and so on until s00:30:02
for example less than or equal to then we will notice00:30:04
that from zero to ten everything will work out for us00:30:06
meanings and for example if giving00:30:08
stood that here we start with00:30:09
We only have a few at all00:30:11
ideally it would be from one to 1000:30:13
heart numbers you came00:30:14
Well, it’s clear here, you can do it all like this00:30:16
I can improve the example if you want00:30:18
write here that initially and the fault with00:30:20
Peter by 100 and we will do it all00:30:22
carry out until we have no more00:30:24
or equal to 10 that is, while she is there00:30:27
199 80 and so on we will be all of this00:30:30
fulfill and of course already00:30:32
it is necessary not to increase but vice versa00:30:33
reduce but I will reduce it00:30:35
also by department, that is, I every time00:30:38
I will divide oh by two accordingly00:30:40
there will be quite a few values and00:30:42
exactly 150 25 and 12 and note again00:30:46
12 is output there should have been output00:30:48
only 12. 12 and a half came out wrong00:30:51
because we just have it because we have00:30:54
us exactly and this is int if in this00:30:58
In this case, it would be more correct to write that00:31:00
This is our chlorine00:31:01
because we are still at 2 all the time00:31:03
divide accordingly it would be 12 s00:31:04
half that is the for loop I think here00:31:06
nothing complicated, absolutely simple00:31:08
a cycle that looks like this00:31:09
is implemented in this way in principle00:31:12
the next loop is running this loop is wild in00:31:15
in this cycle everything is basically the same00:31:17
there are only a few happening here00:31:18
Firstly, we have some differences00:31:20
variable a and which is moved out of the loop00:31:22
for example, it is equal to zero, then we all00:31:25
we will do this until we have00:31:27
less than ten and in the cycle itself we and00:31:29
let's increase it by 2, we can00:31:31
also increase by one for example00:31:33
for diversity we will already increase00:31:35
her for two respectively and I'm still here00:31:38
I will issue additional information00:31:39
online this is what I’ll comment on so that00:31:41
she just didn’t bother me further00:31:43
now if I try to deduce all this then00:31:45
we get 0 2 4 6 800:31:48
if we also put equal here for example00:31:50
10 then it would also come out 10 for example then00:31:52
the principle is the same, just different00:31:55
is that he has a bail cycle00:31:58
and a little bit of all these meanings for everything00:32:00
the values are scattered, that is, oh we need to00:32:03
create in a loop then check and00:32:06
cycle further increase this value oh00:32:08
but nevertheless the wild cycle was very00:32:11
in many cases it is much more useful00:32:13
than there was a cycle in general, perhaps many00:32:16
do things you can't do with00:32:18
in the future you will get more using the for loop00:32:20
understand but the main thing is to understand and you know00:32:22
that there is such a cycle as wild now00:32:24
there is also a third loop, the do loop00:32:27
while, in principle, how is it different?00:32:30
the fact is that we have all these cycles00:32:31
for ivaylo are not executed exclusively00:32:33
if our conditions are true that is, if00:32:36
us terms and conditions is true00:32:38
you are here for example ah more equals 10 or00:32:40
here a and less is equal to 10 then we have this00:32:42
the cycle runs I think it even if00:32:45
condition won't return on it doesn't matter00:32:47
executed at least once therefore00:32:49
if I write here again for example00:32:51
and I let go it will be j200 a second j00:32:56
here let the Nazgul j of a new change and00:32:58
if, for example, it is equal initially00:33:01
100 we will check for conditions until jay00:33:03
again and00:33:05
sorry bye jay jay jay jay00:33:09
our Jay will be smaller than for example00:33:13
I don't know less than ten for example and00:33:16
here I'll just output j and we'll00:33:18
we can immediately notice that we have conditions00:33:20
the gas is not initially correct in the cycle00:33:22
nothing to come in at all but since we00:33:24
I thought such a cycle then once it00:33:27
compulsory, therefore we have00:33:28
the output is one operation00:33:31
passes we get this one of ours00:33:33
Jay, accordingly, is found in the console00:33:35
100 and then this condition is checked but00:33:37
turns out to be incorrect accordingly00:33:39
we are no longer entering this cycle if00:33:41
she was true only to the example we would00:33:42
you came back, it was already a cycle00:33:44
would be the most ordinary cycle00:33:46
for example, the same shaft here, respectively00:33:48
this third cycle which exists in00:33:50
version plus plus thanks to the cycle very00:33:54
It’s convenient to recalculate an array, for example00:33:56
we have a certain array and for example it has00:33:58
there are two elements there and we, for example00:34:01
we initiate them immediately or let you know00:34:03
we've already had some more than once00:34:06
int let's it be char for example this00:34:08
there will be some kind, for example, and there will also be00:34:10
for example, now I can thanks00:34:13
for example, I didn’t think about the cycle, let it be00:34:15
omitting for I will not use00:34:17
I like it in the steam room, it’s a simple principle00:34:19
it will be ideal for cycles00:34:20
suit00:34:21
accordingly here I will have int and00:34:23
starts from 0 it will be less than two00:34:27
element in principle that is 0 1 element00:34:29
here and here00:34:30
oh plus plus, respectively, everything that is00:34:32
now I'll do it display our00:34:34
array00:34:35
I take or that is, this is our array to00:34:37
index and in this way now00:34:40
when I launch all this we will notice that we00:34:42
the console will display a second with and a00:34:45
well, accordingly, that is, absolutely00:34:47
everything works correctly00:34:48
this way all the elements are much simpler00:34:51
display the array on the screen or learn how00:34:53
traders of these array elements rather than00:34:55
take one element at a time and something with00:34:57
do this element if you have previously00:34:59
studied the Situ language, you may have noticed that00:35:01
in this language there is no such thing as00:35:03
strings in C language plus plus above this already00:35:06
worked a little and accordingly00:35:08
there is such a data type as strict00:35:10
it is not built-in, that is, it is a data type00:35:12
which here we are a penny we are with you it00:35:14
connected the string, but still no pictures00:35:17
you can work less and work very much00:35:19
It’s just that in the C language it was just a data type00:35:23
char that is when we can write00:35:25
like y or any one character here00:35:27
plus plus plus basically the same thing00:35:29
is we can write an array of without00:35:33
symbols, for example, we’ll do it here00:35:36
an array of 6 characters and approximately we write00:35:39
his words are a quarrel, that is, everyone every00:35:41
symbol this is one element00:35:43
array00:35:44
accordingly we get something00:35:46
word and in principle it can be called00:35:48
string but if we want to use00:35:50
lines in the future are of course not convenient00:35:53
write it all down in this way, that is00:35:55
creating an array of characters is inconvenient00:35:57
and so you si plus plus is huge00:36:00
the plus is that to the residents of Odessa we00:36:03
we can use just strings00:36:04
how can we use00:36:06
strictly again, we connected with you and00:36:08
string library string means I can00:36:10
feel free to write a data type like00:36:12
string and this is basically the same thing00:36:15
essentially it plays the same role to00:36:17
for example char or something like that00:36:19
yes there you are and so on it’s like a type00:36:21
data that is string and then we write00:36:24
for example hello00:36:25
I will name this variable as halu and00:36:26
Now I can do just these doubles00:36:29
in quotation marks00:36:30
put any any any phrase00:36:34
principle to draw up which is usually00:36:35
write low00:36:36
well, simply because they have more strength00:36:38
I won’t write anything at all, for example00:36:40
seal now I’ll display it all on the screen00:36:42
I'm just writing hello here00:36:45
and online ok if this is all to run then00:36:48
we will notice that we will simply be taken out00:36:50
really the words hello and this00:36:52
indeed absolutely so that is00:36:54
Hello just came out and you see here00:36:56
here it emphasized all this just in case00:36:58
case I'll just say it's not00:37:00
sh ip it just means that we have00:37:02
it's that we created an array but it's nowhere00:37:04
used, that is, and why do we use it?00:37:06
maybe it wasn’t created there00:37:08
create this, it's as simple as that00:37:09
a warning is not an error so here it is00:37:12
if I want some more lines, for example00:37:14
create examples I will write more agarron00:37:16
the name and here we will have00:37:18
world then accordingly I can do this later00:37:20
how to combine these lines00:37:22
I write hello and then I write world world00:37:26
so it's exactly the same as00:37:28
and with numbers, for example, when we are 2 plus 500:37:31
added and got m here absolutely00:37:33
the same thing, but plus we get something like this00:37:36
that's why there's nothing right without a space00:37:38
let's do a little more00:37:40
Let's improve this all, for example I00:37:41
I'll put it here00:37:43
space here and now I’ll display it like this00:37:46
way but if you use the plus sign00:37:48
then basically this is adding rows00:37:51
exactly so she's like one of the numbers for me00:37:53
everything is happening now let's talk00:37:55
I already mentioned about Victor00:37:57
library vector accordingly I can00:37:59
Now it’s easy to work with indicators00:38:00
in order to work with vectors we00:38:03
you will need to write down the following00:38:04
initially we write the keyword00:38:06
vector then specify the type, for example int00:38:09
no space needed here is the name00:38:11
For example, I will simply write this vector00:38:13
object and then I indicate how much00:38:15
elements will be in this vector for example00:38:17
initially let there be 10 10 elements00:38:19
what is the difference between vector00:38:22
and an array if you use an array00:38:24
creation we say that there will be five00:38:26
elements right down to the language itself00:38:29
the very end of the program in this array00:38:31
there will be five elements we can't help but00:38:32
do not add a sixth element there00:38:34
not 7 not 4 do or methods00:38:36
the number of five elements is here you are00:38:39
vectors we can this we can00:38:41
stretch the number of these elements then00:38:44
there is for example initially a meta we have 10 of them00:38:46
I point out that initially I kind of plan00:38:49
put 10 here but at the same time if I00:38:50
I’ll want to change the snakes during the program00:38:53
add this value there too00:38:54
additional values new elements00:38:56
then I can stretch this vector that is00:38:58
to byte there won’t be 10 elements, but for example00:39:01
20 elements means the following is what we00:39:03
we do I create an additional new one00:39:05
array I'll call it ray00:39:07
it will have three element launches at once00:39:09
We’ll put 3 elements here, that is00:39:11
for example we have these00:39:12
elements now let's place our00:39:15
you are the new one and what are the vector arrays like?00:39:17
the way I can do this is I write an object00:39:20
Next I use the function inside this00:39:23
the function just allows us to insert00:39:25
vector in the world arrays vector originally00:39:29
I say where I will paste this00:39:31
an array, that is, I would insert it00:39:32
the beginning of our vector accordingly00:39:35
begin run begin here I go next00:39:37
what vector am I what array am I inserting00:39:40
this is an array called or and00:39:43
then I say what I want to deliver00:39:45
just maybe two elements00:39:47
accordingly it will be 2334 no longer00:39:50
I want to add no elements here00:39:51
now what can I do I can withdraw00:39:53
this massive thing is very00:39:56
element from vector to screen for example00:39:59
how do I write SEO next I write00:40:01
object and then I, for example, indicate00:40:05
I use the function from ups ups ups ups ups00:40:08
the function is in this function in principle00:40:12
I need to indicate00:40:14
the index that I want to display Yandex00:40:16
elements that I want example sheet00:40:18
I want to display the element at index 1 then00:40:20
there it will be 34 we are only two elements00:40:23
they gave me these00:40:24
threw it in and basically added more00:40:26
online accordingly close all this00:40:29
and I ended up running the entire program00:40:31
I will notice that it will be displayed on my screen00:40:33
number 3400:40:35
that is, you are a vector, we added our array00:40:38
just two elements and thus00:40:40
and additionally they were able to deduce00:40:42
one of these elements besides vector00:40:45
I can insert different numbers myself00:40:47
just for example again 8gb00:40:49
begin that is the beginning and in place of the second00:40:52
elements, that is, plus two elements when00:40:54
on the third element I will insert a number00:40:56
and acceptable I’ll just put a number here00:40:58
23 respectively by index and now00:41:01
I'll take it according to the second index we have earlier00:41:05
it wasn't even a number accordingly00:41:07
then our new 23 was inserted here and00:41:09
everything is ready besides I can also take00:41:12
insert object or rather not even so00:41:15
sorry back let me take this one00:41:18
function and just insert something00:41:20
value for example in my startup case00:41:22
will be 45 and that means that I'm taking in00:41:25
at the very end I put this vector new00:41:27
value for example 45 now I will00:41:30
display this last value00:41:32
style for this I use function b a00:41:34
This is the function that displays the last one00:41:36
the value in the vector accordingly in mine00:41:38
in this case it will display just 45 here00:41:41
see 45 has really grown00:41:43
if I wanted to output the first value00:41:44
then I would use the front function and00:41:46
then the number 23 would be displayed on the screen and this is00:41:50
we really have it that way00:41:52
for example here 20 now let's00:41:53
let's talk about functions thanks to functions00:41:55
we can perform00:41:56
we can derive some from our00:41:59
main function main and basically00:42:01
just refer to some functions and already00:42:03
don't rewrite code00:42:05
that is, for example, let's mine you and I00:42:07
let's create a new function it will be with and00:42:09
the data type is howling, that is, this function00:42:11
returns nothing00:42:13
every function needs something and maker00:42:15
not any data type i.e.00:42:17
for example our main function has type00:42:19
data hand why because she00:42:21
returns an integer value00:42:23
this is really 0 and this is an integer00:42:25
number that's why it doesn't have my function00:42:28
There are no refunds at this time00:42:30
she will just write on the screen00:42:32
some some meaning that we will not00:42:36
and we wouldn’t throw it here00:42:37
pass parameters and see00:42:39
important point i function and noise above00:42:42
functions00:42:43
main in this way when there is a program00:42:45
run compiler see ours here00:42:48
these are the functions and if I00:42:50
you use the main function to call00:42:53
these functions tone he will understand that00:42:54
they really exist it's important00:42:56
moment it means that and doing yourself would00:42:59
pass the parameter it will be string00:43:01
because again the library is up to me00:43:03
the string is still connected then I will myself00:43:05
just pass any keyword00:43:07
some words and which I will display on00:43:09
the screen has sat down and here I will describe the word00:43:13
here we go online, let more and more come here00:43:16
I won’t write anything additional later00:43:17
now how can I what00:43:19
to refer I just write the name of the function00:43:21
it's called print and I put it in it00:43:24
a certain word in my case is00:43:26
one parameter is really needed00:43:28
put this with data type string00:43:31
accordingly it will be a string for example00:43:32
I'll write Hello World here like this00:43:36
In addition, I can00:43:38
pass the parameter directly like this00:43:39
I can pass it through a variable, that is00:43:41
for example, here again a certain one has been created00:43:43
string so I’ll name it, for example, I don’t know00:43:47
what to call it on let it be and in00:43:50
I'll put it in Hello World now I can00:43:52
just convey for example change00:43:53
accordingly, if I try something like this00:43:55
display on the screen then we will notice that we00:43:57
everything is absolutely true with you we are just00:43:59
written hello world00:44:01
at least we don’t have any main functions00:44:03
simau so no, that is, everything would work00:44:06
functions at00:44:07
that's cool besides we can create00:44:09
other functions, let us give you an example00:44:11
let's create a function that will00:44:12
return the divisor number of the definition then00:44:16
there is for example I will call it gave and this00:44:18
there will be two in it we will transmit00:44:20
parameter this will be fleet a00:44:23
and the fleet used, that is, these are 2 cups00:44:26
flatbed00:44:27
here are two parameters and what we will do00:44:29
already since us we since we00:44:31
we pass the type of some data, that is00:44:33
she already has to give it away00:44:35
function we must have00:44:37
should be a keyword like00:44:38
lifting we return the value00:44:40
means food actor a divided by b and00:44:45
we need to do some checking here00:44:46
because if, for example, we have a00:44:48
is zero then we cannot divide by00:44:51
zero or rather here b is zero then we00:44:53
we can't divide by zero, that means we're here00:44:55
let's just write a check00:44:57
if b is equal to zero then00:44:59
accordingly we will simply00:45:01
returning the value 0 for example is simple00:45:03
the number 0 to otherwise we will return00:45:06
dividing the number 1b00:45:07
accordingly this is a very important point00:45:09
because if we don't00:45:11
a similar check then the program if we00:45:13
enter the number 0 as parameter b then00:45:17
the program will exit with an error00:45:20
accordingly, if we have it00:45:21
a real program for example, then this would be00:45:23
the program has closed altogether, it’s very00:45:25
bad so it must be checked00:45:27
now what do I want to do for example I00:45:29
I'll create a new variable, I'm sorry00:45:31
there will be a fleet, of course, because we have00:45:33
there is a fleet of data types everywhere here it will be00:45:36
called rice and she will take00:45:38
the value of the function that is, we are in it00:45:41
put the function value for example 2300:45:43
divided by 2 it will be like this in essence00:45:45
it turns out that you00:45:47
when we create a stage00:45:49
we call the function immediately and do not pass it00:45:51
we barely check two parameters this 2300:45:54
if our two is not equal to zero00:45:56
well, that is, if it is equal to zero then we00:45:59
return 0 if it is not zero00:46:00
then we actually end up with 2300:46:03
divided by 2 will be this result00:46:05
written into a variable now that I00:46:07
I can do I can use and00:46:09
yet with our printf function it is much00:46:11
I think it’s more convenient than writing00:46:13
seal online and so on and just for me00:46:16
write the cut and everything and basically after00:46:19
we'll have it out now, but it's there00:46:22
one small mistake what does it have to do with it00:46:23
is that we00:46:25
since we have a fleet and we have to come here00:46:28
pass the string parameter that is00:46:30
again an important point to00:46:32
Of course I can fix this error00:46:35
First of all, write down a new function then00:46:37
there is for example00:46:38
copy this function write print00:46:40
the fruit is to transfer float values here00:46:43
accordingly, and then use00:46:45
specifically the function print fleet where is it there00:46:49
we had it here it brought00:46:50
Well, yes, of course there will be no mistakes, but00:46:53
it's inconvenient it's really inconvenient00:46:56
how can we solve all this?00:46:58
in C plus plus language there is such a thing as00:47:00
function overloading what does it mean00:47:03
means that we take this function of ours00:47:05
white print and overload it then00:47:09
yes, we are already passing parameters here00:47:11
another for example not string but for example00:47:13
fleet that is us the same name00:47:14
all absolutely tori the newest parameter00:47:16
we are already transferring to another or for example we00:47:18
we we could transmit something else00:47:20
the number of these parameters is thus00:47:22
here again to return that we are00:47:24
use the function in this way00:47:26
thanks to this before overloading methods00:47:29
We the compiler understands which one exactly00:47:31
functions we refer to example here we00:47:33
let's turn to this function why00:47:35
because we are passing a parameter here00:47:37
string specifically with this data type00:47:39
string right here he understands that we00:47:41
we transfer the slot and accordingly it00:47:43
understands that we are addressing this00:47:45
functions and thus if that's all00:47:47
try to display all this on the screen00:47:49
we can't try to start it00:47:51
absolutely no errors everything is displayed00:47:53
absolutely correct eleven s00:47:55
half and hello world absolutely00:47:56
are displayed correctly in addition00:47:58
method overloading can be done again00:48:00
to be achieved thanks to what we00:48:03
add several parameters, that is00:48:05
for example here we had a flat bar00:48:07
here we had, or rather, string word a00:48:09
here I will for example convey00:48:11
several parameters for example, even with those00:48:13
the same with the same meaning with the same or rather00:48:16
data types, that is, for example00:48:17
string word and additionally another example in00:48:20
the next parameter may be it again00:48:22
after all, string can be any type00:48:24
data Let’s just omit it, but for example here00:48:27
accordingly the board is what I will00:48:28
write here00:48:30
example we will display proud and plus a00:48:33
let there be an additional plus00:48:35
we have some additional gap here00:48:36
such, for example, that is, thanks to this00:48:39
thanks to this poison they can00:48:40
add some more here00:48:42
result resort is is ii + second00:48:47
as a parameter, pass all of ours like this00:48:49
so again, the compiler will understand00:48:51
what we specifically address in this00:48:53
case to this function why because00:48:55
we will pass two parameters here:00:48:57
line and this is the result of type fleet here00:49:00
accordingly we will get something00:49:03
similar to this here is the result from 11 s00:49:06
half respectively this way00:49:08
we can implement overload00:49:09
methods and in general this is how we00:49:11
we can write functions in C plus language00:49:13
plus besides former plus plus00:49:16
it is considered good form when we00:49:18
write functions not above main functions00:49:21
and under it but remember I told you that00:49:23
You can't do that because the compiler00:49:25
won't notice them and just be talking00:49:27
that such courses do not exist means how00:49:30
this can be implemented00:49:31
look I'm wearing for example the function howls00:49:34
print I'll just cut it out and instead00:49:37
I’ll write her boyfriend and then tell her00:49:40
one parameter string word for example here00:49:43
and after that I’ll close it like this00:49:45
So with a semicolon everything is like this00:49:47
way the compiler will pass it00:49:49
will already understand that there is such a thing00:49:51
function called print it00:49:53
takes one parameter, this is a string and00:49:56
board is basically what this thing is called00:49:58
this parameter and now I can under00:50:01
main functions implement this function00:50:03
that is, very here and and just write down and00:50:05
all this way we all these functions so00:50:08
the same thing can be remade, that is, simply00:50:10
by writing them down00:50:12
in this way, for example, we would have a fleet00:50:14
would be so the fleet would be00:50:16
here was in the fleet and basically00:50:20
we closed it all and here she is00:50:22
If only this function already existed00:50:24
same with this function this way00:50:26
when we open the program we don’t see00:50:29
these bunch of our different functions we00:50:30
we immediately see what functions we have00:50:32
exist and we immediately see the main funk00:50:36
immediately the most important function of me is this00:50:39
it's considered good manners00:50:40
programming is why00:50:41
do better00:50:43
record here create visibility00:50:46
the fact that you exist these functions00:50:48
and then implement them under the functions00:50:52
together so you will have everything right00:50:54
Amazing00:50:55
let's also look at the exception to00:50:56
For example, I'll take our to-do function and00:50:59
I'll basically delete everything here, exit like this00:51:00
there are already checks and the function will always be there00:51:02
work correctly but also better00:51:04
use for similar cases00:51:05
checks that is trike hdmi three times00:51:08
anything we try avtech we anything00:51:09
catch therefore otter I try if ours00:51:13
b will not be equal to zero00:51:15
then accordingly let's just00:51:17
let's return face or let's do this00:51:20
We won’t even be here to return us00:51:22
here entries and we will be just a game for him00:51:26
it will be stronger here we are to this figure00:51:28
we will assign values for example but00:51:31
let a divided by b respectively00:51:34
it will all be logical and true00:51:37
everything is absolutely fine, but if you00:51:39
us b will be equal to zero, that is, lc then00:51:43
we will throw it away00:51:44
error, that is, the deadline, throw out the error and00:51:47
we put a parameter in it, for example I00:51:50
I would put that is ours this one here00:51:51
the variable is essentially now what I do I00:51:54
I'll write down the following keyword: bake I00:51:57
I'm catching this error as if I'm the only one here00:52:00
this is our parameter that we are passing00:52:02
in my case, for example, maybe we00:52:03
let me write barium so that it’s somehow00:52:05
it sounded different and that's what I'll be here00:52:07
I will do to our variable p c00:52:10
let us add the value such that a00:52:13
well, let's just let ours just00:52:16
the variable res will be equal to the number a00:52:17
that's all we are here anymore00:52:19
besides I am registered incorrectly00:52:21
wrote the oven therefore00:52:23
I'm sorry for this, it's better like this00:52:26
the way it is written, correct it if00:52:28
they also spelled it wrong00:52:30
the last thing I need to do is00:52:32
because he is thus our function00:52:34
completely ready completely done then00:52:37
here we will try to do something00:52:39
if we get that definition well00:52:42
so that the ball is not equal to zero, we all00:52:44
divide correctly if it is equal to zero then we00:52:46
we throw an error and in this error we00:52:48
we just do the next thing like this00:52:50
like crucian carp we assign a value otherwise00:52:53
there is this way you can track00:52:54
exception errors here in principle00:52:57
anyway, let's do it now00:53:00
consider pointers and links to the first00:53:02
at a glance it will seem to you that the pointers and00:53:04
links are basically the same thing00:53:05
in fact these are slightly different things00:53:07
then I will explain what it is in principle00:53:09
and what are their differences, now let us00:53:11
just by you we will create a flour pointer00:53:14
that is, using the example, I will create a new change00:53:15
she will be well i her value will be 900:53:17
for example, now I will create another one00:53:19
the variable will already be a pointer to00:53:21
I write our first variable using the example00:53:24
I’ll write my way and then I’ll insert an asterisk00:53:26
Becker, for example, is just a name00:53:28
our peterbilt variable is ours00:53:31
name of the variable here and I indicate that00:53:34
This00:53:35
this pointer it refers to00:53:37
variable b for this I put00:53:39
ampersand and indicate values and indicate00:53:43
the name of the change for which I00:53:44
I refer in such a way that I need it00:53:47
in principle, everything is given by the fact that when00:53:49
in a case like this we just get it00:53:52
drink and r.l. copy the value of our00:53:55
variable b, let's do it in principle00:53:58
I didn’t want to bring it out so that by the way00:54:01
output must also be used00:54:03
peterbilt asterisk we then for example00:54:05
I’ll add more online00:54:06
Now let's run this all and we will notice that00:54:09
we have 5 are well she really is00:54:11
as you can see it was not originally00:54:12
assigned and but actually output00:54:14
values 9 for her, that is, I just00:54:16
you copied the value of the variable00:54:18
ask why such nonsense is needed at all00:54:20
to do is that it's here it's very00:54:21
important point in c plus plus00:54:23
and an incredibly useful point in si plus00:54:24
plus remember we are just with you00:54:26
we looked at the functions and functions00:54:28
passed various parameters and ok to00:54:30
in this case we had simple ones there00:54:32
parameters and by number 1.00:54:34
is it a small line or something like that00:54:36
spirit, but if we need a function00:54:38
pass a huge array for example this00:54:40
it's very stupid to take it and completely00:54:42
transfer you for example take for example00:54:44
will say00:54:45
led it just let us be00:54:46
a huge array and for example we00:54:48
take it and grind it completely00:54:50
functions it would be stupid it would be much00:54:52
more convenient much smarter to transfer00:54:55
specifically a copy of this array for example00:54:58
for this we can make something like this00:54:59
copies, that is, we take and make a copy00:55:01
but in our case we made a copy00:55:02
variable, well, basically the same00:55:05
things happen with arrays of others00:55:07
data types and then something here is simple00:55:09
this example was here and then we already00:55:12
we pass exactly the copy to the example function00:55:14
if only we had some kind of funk oops00:55:16
funk example here and there you conveyed00:55:18
here is the parameter Peter white-white for example00:55:22
and accordingly it would already be00:55:23
a copy of our array, for example, or in00:55:26
in our case, this is a copy of our variable00:55:28
and this greatly optimizes our00:55:29
program and believe me when you will00:55:32
creating a huge program is very00:55:33
will help you a lot for optimization except00:55:36
what else can be done can be done00:55:38
pointer to pointer how it00:55:40
it's done it's done with the help of already 200:55:43
just asterisks can also be a pointer00:55:45
to pointer to pointer do at00:55:47
help three for the protective ones so on00:55:49
how I usually write it down00:55:52
St. Petersburg is further than lvl 5, that is, like this00:55:55
Peter is always added00:55:56
additional axis + 1 if plus one00:55:58
asterisk + 1 peter but it's like so00:56:01
purely ethics you can say that's what I00:56:04
here did I already make a pointer to00:56:05
the pointer is accordingly simple00:56:07
insert person.it lvl like this00:56:09
way now if I output here00:56:11
I also picked this thing up here00:56:13
two stars needed00:56:14
put it in principle that's all00:56:16
will update and we will see what we have00:56:17
and yet 9 came out all which we have00:56:19
there’s just a copy of Inkin’s copy00:56:21
the original so to speak except that00:56:24
there's more you can do, look00:56:26
why do I say that you really are everything00:56:28
before we copy because for example if00:56:31
take the index of the cell in which it is located00:56:34
information for example, related to this pointer00:56:37
we can simply take this index00:56:39
by writing picker00:56:40
for example Peterbald here is an additional one00:56:43
I’ll also display the index of where it is located00:56:46
our variable in00:56:48
for this I will need to put00:56:50
ampersand then we will notice that these two00:56:53
the cells will not be identical, that is00:56:55
look if you look closely here00:56:57
the only thing is no, I'm sorry they won't00:56:59
identical and because I didn't take petir00:57:02
Petyr Vala and it’s still a copy of us00:57:05
for a copy that's why let's do it anyway00:57:07
let's do Peter Val and Peter and just in00:57:10
if you take these, then they are00:57:12
really will be absolutely similar00:57:13
they are identical and there will be cells like this we00:57:16
actually making a copy00:57:17
let us now consider a certain variable00:57:19
links and again I repeat they are very00:57:21
similar to and pointers, that is, you are right00:57:23
now you won't feel any difference00:57:25
first, let me probably delete this00:57:27
we will also remove this thing Peter Waves in00:57:29
in principle we will have exactly the link00:57:31
so how did I write down00:57:32
I put an ampersand next to something00:57:34
the name I will put for example that the tariff00:57:36
that is, the referent is here, for example, a link and00:57:38
here I no longer need to point from the pier00:57:40
Well, that is, how to refer to a cell00:57:42
and refer to Yandex, namely just us00:57:44
we make a reference to a variable, that is, we00:57:46
we don’t copy it and just build on it00:57:48
link what happens here when we00:57:50
then we will refer to this link we00:57:52
we won't be able to have direct access00:57:55
directly to we as if not not directly00:57:58
we work with this variable and we00:58:00
just refer to this variable then00:58:02
is if we copy if with pointers00:58:05
we copy everything, then with links we just00:58:07
we refer exactly this way and00:58:10
what can be done here in principle if00:58:12
I'll display it on the screen for example00:58:14
they simply omit the Russian Federation, for example00:58:18
we will notice the next topic that us00:58:21
the same number will be displayed on the screen again00:58:23
9 that is, everything is absolutely logical, but the point is00:58:26
what is it that we are not a reference00:58:28
copied00:58:29
we just took the data and and00:58:33
made a reference to a variable we need00:58:35
where and when is it better to use a pointer00:58:38
When is the best time to use links?00:58:40
if you work with any00:58:41
dynamic arrays for example00:58:43
heels in which will be added there00:58:45
new elements in the future and so on00:58:46
then it is better to use pointers to00:58:48
for example, in our case we are in this00:58:50
right now we're just00:58:51
working with one simple change00:58:54
so it would be more appropriate here00:58:55
use exactly the link that's what we00:58:57
just what they did to you, that is, we are here00:58:58
I used the link with you here in principle00:59:01
these links they and links index they00:59:03
perform their role perfectly when used00:59:06
their functions, that is, how to use them00:59:08
functions are very simple just you instead00:59:10
in order to pass the variable itself00:59:12
pass on and either a link to this00:59:14
variable or pointer to this00:59:16
change this program will already be much00:59:18
it will work much better00:59:20
optimized rather than00:59:22
I'd rather not do that now00:59:25
let's get down to a topic like00:59:27
creating classes and objects00:59:29
what is experience in principle when we00:59:31
we create a certain class and from this class we00:59:34
create an object and for example we will be00:59:36
class machine and we can create00:59:38
several objects for example it will be00:59:39
let skoda00:59:40
and a Skoda car, an Audi car and a BMW car00:59:43
that is, each car will have00:59:45
own characteristics but00:59:47
Moreover, if we are in class anything00:59:49
write to write new function to00:59:51
for example, to make the car move00:59:52
then all objects will turn out this time00:59:54
function and we can no longer do it00:59:56
rewrite for each object00:59:57
separately, that is, it is very convenient and00:59:59
let's do it better with an example01:00:01
let's consider first we will get out of01:00:03
functions main and write just the class01:00:05
keyword and for example and I’ll name it01:00:07
like corr because I want to create a class01:00:10
with cars it’s important that you do more01:00:12
also closed01:00:13
further with a semicolon, that is, this is it01:00:15
such an important moment01:00:16
further in the class we can create with01:00:19
you function fields or rather in the class it is01:00:22
It's not called a function, but it's essentially a method01:00:24
these are the same fields, these are variables01:00:26
that is, we can create with you01:00:28
essentially fields and methods are also constructor and01:00:31
destructor and let's start01:00:33
Let's create a certain field with you and for example01:00:36
we indicate that access will be controlled for him01:00:39
that is, all the fields, all the methods that01:00:41
are with access to the authorities and they01:00:44
belong exclusively to the class and are not01:00:46
visible outside the classroom and in other classrooms and their01:00:49
also not a view, for example, if here01:00:50
in height I’ll indicate for example oops height then01:00:54
we get variable access which we01:00:56
we have exclusively in this class then01:00:58
Is there an example if I continue to write?01:01:00
there is some function I can specify that01:01:02
I am the height in it01:01:03
using this function but the main thing is01:01:06
that outside of this class I do not have access to01:01:09
this variable I to this field and and01:01:12
In general, outside of classes I also have access to it01:01:14
to them this is precisely an access modifier01:01:16
right there is also a protector01:01:19
protected is when we will be when we have01:01:22
again let there be some change01:01:24
this will already let in agility, for example, and01:01:26
it will be I don't know speed01:01:29
let this be what it means here too01:01:32
what we have access to in the classroom is of course01:01:35
in which we created this change and01:01:37
also you are the heir classes01:01:39
will inherit from this class them we01:01:40
We'll look at both access and01:01:43
public access modifier01:01:44
tells us that all variables are all01:01:48
functions that will be written in it we01:01:50
we can contact them from the classroom itself01:01:53
classes of heirs and generally from others01:01:56
in general there well and in general if we for example01:01:58
in the main function we will then create an object a01:02:00
we will again have access to everyone01:02:03
with this one things that are in public01:02:05
access modifiers are now in01:02:07
public modifier let me create01:02:08
new new method01:02:10
I'll call it z plus, that is, thanks to01:02:13
In this method we will install two01:02:14
these are our variables, for example them01:02:16
we will install01:02:17
besides I don't use what on01:02:19
trace inheritance therefore not but protected01:02:21
I’ll just delete this modifier now01:02:22
I will be in we are in01:02:24
modifier rules here these01:02:26
variables besides all these01:02:28
modifiers can also be used public01:02:30
you can write your variables to01:02:31
for example, if there is some variable at home01:02:33
write down can also be corrected01:02:35
write down some methods like I do now01:02:36
in a public post, that is, it’s just like01:02:39
example now that I'm here not that I'll be01:02:41
pass to this to this method in this01:02:43
method I pass 2 in two parameters this01:02:47
hate that is the height of which I will be01:02:49
I set it to install for a specific machine01:02:51
fleet is speed, that is, again for01:02:54
specific car now that I01:02:56
I will do when I call the functions I want01:02:58
set these parameters for these01:03:01
for these fields which are in01:03:03
class how do I write the key01:03:05
I put our word here like this01:03:07
things, that is, I indicate that I01:03:09
I turn to this class and take it from him01:03:11
for example height of this variable01:03:14
and set the parameter values for it01:03:16
which we are just passing on here, that is01:03:17
this is the same parameter01:03:19
absolutely I do it for speed01:03:21
that is, for speed like this01:03:24
now we are preparing to call the function01:03:25
set two two new parameters with01:03:29
to the objects that I create now01:03:31
let's just create some new one01:03:33
object how to make it exactly the same here01:03:35
as we wrote for example intel and float or01:03:37
so then here it’s the same thing only01:03:39
you need to write the name of the class for which01:03:41
we from which we want to make an object01:03:44
that is, I am writing in my case corr because01:03:46
that it is called that and for example01:03:48
I will have a Skoda car01:03:49
now let's just close it all and01:03:51
basically now I can refer to this01:03:53
skoda as to an ordinary object, that is, as01:03:55
as some kind of variable and through a dot01:03:59
get all those fields and all those methods01:04:02
who are in public because01:04:04
will fix and protect these they have access to01:04:06
to them so what can I do here01:04:07
see here by the way01:04:08
in young fleet and float speed or rather01:04:12
I'm sorry they crossed out because they are located01:04:14
correct accordingly I have no relation to them01:04:16
access, for example, if it’s purely for01:04:18
example if I translate it will be corrected to01:04:21
public then again.01:04:23
even though he is sleeping, we can already have access to them01:04:25
access is important here's the moment back01:04:27
We’ll probably return all this, that’s what it means again01:04:30
once skoda and I want to take the sequel from here01:04:32
this this is our method and transfer to01:04:34
2 parameters for example we will have a car01:04:37
weighs one thousand one hundred kilograms, that's the speed01:04:41
and let it be with me, she misses 234.01:04:45
44 that's what they are and the speed01:04:48
it will be a super fast skoda in principle01:04:50
Now I have these parameters set01:04:51
let us also have them all01:04:53
additionally output therefore I will01:04:55
I’ll write another method here: print01:04:57
launch will be called and for example everything01:04:59
what will he do he will be on the screen01:05:02
In principle, we can display the height here01:05:06
again use zys ys ys ys01:05:10
let him be here at the height01:05:14
output and also through some other under01:05:17
This is what a physicist will deduce01:05:19
additionally letting in here. they are not .01:05:23
speed here we are, in principle, online01:05:26
be and in general that's all now I'm again01:05:28
I can still use this method, I write01:05:31
just skoda. print and that's it and output to01:05:34
screen this is this line01:05:36
and with the values that I01:05:38
installed here one thousand one hundred and two hundred01:05:40
three four let's start it all up what01:05:42
see what 2 turned out to be01:05:44
we'll get just a simple little thing01:05:46
we will be displayed on the screen one thousand one hundred and two hundred01:05:48
344, that is, which was originally installed01:05:50
but what is the special edge in that01:05:52
what if I create a new car01:05:54
this new object will be audi for example and01:05:56
for it I will set new values to01:05:59
example here I will release 201:06:01
tons and the speed there will be 300 25.501:06:06
let us notice what we have for the new01:06:09
machines are set to new values01:06:11
this is very very cool because01:06:13
now we have a class in which there is01:06:16
general some values general fields general01:06:19
methods01:06:20
so we can based only01:06:21
create objects that will have01:06:24
own characteristics but in principle01:06:25
if we want to add to all objects01:06:27
a new function to make the car drive for example01:06:30
you just class this function01:06:31
we add and all our objects are already01:06:33
All of our machines are already capable of01:06:35
yoga ride is very, very cool01:06:37
now let's talk about constructors01:06:39
designers are basically such a thing01:06:41
here it is and now we have it but it01:06:43
using the default here i.e.01:06:45
when we create an object01:06:46
we can immediately ask him some01:06:48
parameters for example here I am in01:06:50
the next method already asked him01:06:52
parameters that is a thousand wait so on01:06:54
I can do this immediately upon creation01:06:56
object it would be much more convenient01:06:57
so again I need constructors01:07:00
write it down in public because I’m01:07:02
I want it immediately when creating objects and not01:07:04
set parameters so I and so and01:07:05
I did it, I'll write it down, it will be a public constructor01:07:08
how does it fit in exactly01:07:10
should rewrite the name of our class01:07:11
further as if this function or so01:07:14
as if this method is working itself out01:07:16
in principle and in the same in the same throwing01:07:19
which constructor actually is01:07:20
write down anything basically01:07:22
for example I will do the following I will01:07:25
get again release two01:07:26
parameter01:07:27
I may not get them kids actually01:07:29
let me install the kit01:07:30
receive01:07:31
In principle, I will install it right away01:07:33
there is it will be Kai for the Swede only01:07:34
which will trigger initially at the very01:07:37
I myself can say the start is like this01:07:39
look at us here right away01:07:41
two errors are given because we have01:07:43
skoda for example and we have no parameters01:07:45
we don't really need to install here01:07:47
they need to be installed here, that is01:07:49
how do I write for example here01:07:51
let me rewrite the same values01:07:52
I’ll just comment on it all like this01:07:55
but for Audi, for example, I don’t want01:07:57
I want to use a constructor for it01:07:59
by default how can I do this01:08:00
do remember we discussed in01:08:03
redefining the function here is the principle01:08:05
nothing like this as soon as01:08:06
overriding constructors i.e. I01:08:08
I can write down the following that I have01:08:10
some constructor that does not accept01:08:13
no meanings and nothing01:08:15
install that is, like this01:08:17
The default constructor is like this01:08:19
So now I will compiler myself01:08:21
understand when I use the constructor01:08:23
for example for skoda I use01:08:24
the designer here is this one, that is, prestor01:08:27
when creating an object, I immediately give it01:08:28
parameters and for audi I use01:08:30
the designer is this one when I do nothing01:08:32
I don’t pass it on and then I can, for example01:08:35
or01:08:36
purely at will, I can already add some01:08:39
new characteristics for a car or01:08:42
do not do this, in addition, look here01:08:44
skoda I can and will comment on this one too01:08:46
I can also immediately call a line of code01:08:49
for example our print function01:08:51
So I just write print and that’s it01:08:53
way now when creating an object01:08:54
skoda I immediately set the parameters and01:08:56
immediately and display these parameters if it is01:08:58
I’ll display everything on the screen and then we’ll replace it01:09:00
basically the same as before01:09:02
it was but nevertheless it is already with01:09:03
using constructor names that01:09:06
much more convenient actually besides01:09:08
there are also destructors destructors01:09:11
they are written as follows01:09:13
there it is written like this tilde01:09:15
then the name of the class is written and01:09:19
this destructor is triggered when we01:09:22
it turns out we finish working with the class then01:09:24
there is, when deleting, you can say class01:09:26
so here I am all is ok for example I01:09:31
I'll write01:09:32
oysters ok here and for example online01:09:35
I'll add it when you get it, let's do it01:09:38
let's run it all again and see01:09:40
when you see this one with us01:09:42
the destructor starts up as you can see it after01:09:44
just after we created one01:09:46
object after we created the second one01:09:48
object and then only you were taken out01:09:50
twice the music, that is, it is displayed01:09:52
after we've finished01:09:54
work with the class we have completed work with01:09:56
class after creating this second one01:09:58
of our object when we have all these functions01:10:00
all these methods have been done more and more by us01:10:03
they did not return to him later01:10:05
that's why he's a jockey in the world that's why he's a destructor01:10:08
worked and displayed paul is ok01:10:10
destructor I will repeat them again01:10:13
trigger when finishing work with and01:10:15
class, that is, they are constructors01:10:17
vice versa when we just create a class01:10:19
destructors when we're done01:10:21
work with the class and let's do some more01:10:22
Let's look at inheritance01:10:24
inheritance is a very important concept about01:10:26
so it's still worth considering01:10:28
example here we have a class to01:10:29
we can create another class which01:10:31
will inherit all all fields all01:10:34
methods from our main class to01:10:36
For example, our main class will be01:10:38
corr and he will explore all these fields01:10:41
and methods that are modifier01:10:42
public access01:10:43
or protect extra view I again01:10:45
I repeat, these are only those01:10:47
this is all they are doing01:10:50
are coming exclusively for this class itself then01:10:52
there are more and more of them nowhere to be seen so01:10:54
let me create a new class for example01:10:56
it will be nothing again01:10:58
nothing new is happening yet, we are writing01:11:00
class moto mod say if not correct01:11:04
I wrote that, sorry01:11:05
here is a motorcycle and it is inherited from the class01:11:09
I won’t leave it this way: later01:11:12
food by black car01:11:14
well, that is, class pen, I want everything01:11:16
inherit and basically it’s the same01:11:18
I already have the schema in this class now01:11:21
access to example destruct constructor01:11:25
corr to the method Silva carried away print and in01:11:29
principle to the destructor even have also01:11:30
I don’t have any toast here yet01:11:33
no access see what I can do01:11:35
do for example if and now I create01:11:37
let's say, for example, the sea will cycle me and01:11:41
let it be me01:11:44
mw they are produced like this and if I01:11:48
I want a BMW now01:11:50
use set given here, that is, like01:11:52
you see I really mean them01:11:54
access and it's very cool that is me01:11:56
it turns out this class inherited all those01:11:58
fields all those methods from our main01:12:01
class our main class is like this01:12:04
So I can basically point this out here01:12:06
2301:12:07
indicate here 234 4 for example and in01:12:10
basically if in the future I will01:12:13
use give something else01:12:14
redistribution I will put here that we are we01:12:16
we use protected, that is, it01:12:19
is now available directly from01:12:21
not only this class but also01:12:23
additionally from moto sites now01:12:25
in the future if I want to withdraw here I am01:12:28
I installed them, these don’t matter now01:12:30
I want to get these two out of motorcycles01:12:31
I will add additional values here01:12:34
new method01:12:35
he will be on my public page evil oops01:12:37
change the public and then void01:12:40
well, let it also be called01:12:42
for example, since they do not conflict with these01:12:45
two names 2 absolute classes no01:12:47
there will be no conflicts here now01:12:49
just to show off hate or01:12:51
and Petya using the following I can01:12:52
write basically the same thing01:12:54
the most important thing was that it was here and01:12:57
just put it here01:12:58
the only thing I don't need01:13:00
use zys because it’s a principle01:13:02
you can just use what I01:13:05
I use faith I take the hater she sleeps01:13:07
which is in my class01:13:08
basically it's hi-speed01:13:11
I just miraculously get them out this way01:13:13
look I created a descendant class from01:13:15
BMW object BMW01:13:17
indicated the values for it and through01:13:20
method which is in the main class01:13:22
here and now I can use01:13:24
own method01:13:25
I opened the class BMW motorcycle and put it01:13:29
here I write print for example now01:13:32
if I run this all then we will notice01:13:35
The following is what we get:01:13:38
here is our first value is 200 323 and01:13:42
230 4.4 that is, absolutely everything is correct01:13:44
it works and it's just great01:13:46
so, in principle, you and I can01:13:49
say we have completed work on01:13:50
classes and objects01:13:52
We looked at how classes are created01:13:54
how objects are created that's all01:13:56
objects this is how field methods are created01:13:59
access and inheritance modifier at once01:14:02
also my constructor and destructor and and in01:14:03
In principle, we can end this01:14:05
and this is where we can end our01:14:08
The video lesson turned out to be very big but01:14:10
in it we sorted out absolutely all those01:14:12
important concepts that are present in01:14:14
and siii++ now you can01:14:15
really say that you know01:14:17
plus plus of course you need a little01:14:19
practice but nevertheless we are all basic01:14:21
moments you already know in C plus plus01:14:24
That's all, sign up and go to01:14:26
VKontakte group go to the IT website01:14:27
Prager dot com all links will be in01:14:29
video description see you soonDescription:
В этом видео мы с вами изучим C++ от самых азов и до сложных задач всего лишь за час! В уроке мы изучим переменные, циклы, условные операторы, а также затронем сложные темы, к примеру: классы, объекты и многое другое. 1) Скачать Visual Studio: https://www.visualstudio.com/ru/vs/cplusplus/ 2) Онлайн компилятор: http://cpp.sh/ 3) Урок на сайте itProger: https://itproger.com/course/one-lesson/5 4) Полный видеокурс по языку C++: https://www.youtube.com/playlist?list=PL0lO_mIqDDFXNfqIL9PHQM7Wg_kOtDZsW ✔ Основной сайт: https://itproger.com/ ✔ ------------- Группа Вк - https://vk.com/prog_life Группа FaceBook - https://goo.gl/XW0aaP Instagram: https://www.instagram.com/gosha_dudar/ Я в Google+ - https://goo.gl/Tqt9W0 Страничка Twitter - https://twitter.com/GoshaDudar Страничка Вк - https://vk.com/codi999 ✔ Начните зарабатывать на YouTube - http://join.air.io/money_air ✔ Видео по заработку на YouTube - https://goo.gl/RLPXV8 Помощь в развитии канала. * Яндекс Деньги: 410014343706921 * Кошельки WebMoney: - Доллар: Z331064341236 - Гривна: U386388718252 - Рубль: R214610220703
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