Actually no practice needs, but I have got interesting idea to define such class, whose objects cannot be passed as arguments to any function. Now okey, I can define copy and move ctors as deleted to forbid passing it by value. How do I do it in case of passing by reference?

No you can't

Actually no practice needs, but I have got interesting idea to define such class, whose objects cannot be passed as arguments to any function. Now okey, I can define copy and move ctors as deleted to forbid passing it by value. How do I do it in case of passing by reference?

Make it only passable through a helper function

But a second thought Yoy can't hide from references xD

Actually no practice needs, but I have got interesting idea to define such class, whose objects cannot be passed as arguments to any function. Now okey, I can define copy and move ctors as deleted to forbid passing it by value. How do I do it in case of passing by reference?

std::addressof is still able to take the address as well

Why are the error?(just a joke)

Well, I realized that I couldn't send pictures

#include <stdio.h> int main(int argc, char* argv) { unsigned int a = -3427; printf("%d",a); return 0; } Why it's not giving me any error ?

#include <stdio.h> int main(int argc, char* argv) { unsigned int a = -3427; printf("%d",a); return 0; } Why it's not giving me any error ?

Why should it? Assigning negative number to uint is not an error.

That's what I'm asking ? If we can store negative value in unsigned then how it make sense ?

That's what I'm asking ? If we can store negative value in unsigned then how it make sense ?

If you want safety like this, don't use C

You can't store a negative value in an unsigned integer, but an integer is the same size regardless of whether it is unsigned

#include <stdio.h> int main(int argc, char* argv) { unsigned int a = -3427; printf("%d",a); return 0; } Why it's not giving me any error ?

You did it on visual studio and didn't get errors?

#include <stdio.h> int main(int argc, char* argv) { unsigned int a = -3427; printf("%d",a); return 0; } Why it's not giving me any error ?

lol

You did it on visual studio and didn't get errors?

I did it on terminal

#include<stdio.h> int temp=30; int main() { printf("Enter a humid :"); scanf("%d",'&&humid'); if(temp>32) { printf("it's Spring"); scanf("%d",'&&humid==1'); } else if(temp>32) { printf("it's Summer"); scanf("%d",'&&humid==0'); } else if(temp<32) { printf("it's Winter"); scanf("%d",'&&humid==1'); } else if ( printf("it's Autumn") ) return 0; } Write down the output when: a. Temperature=29 0 C and Humidity-I b. Temperature=35 0 C and Humidity How to do a.

That's what I'm asking ? If we can store negative value in unsigned then how it make sense ?

We use casting to uint. Overflows are defined for uint.

We use casting to uint. Overflows are defined for uint.

Can you explain it in detail ?

And it's confirming C++

Indeed the only thing specified is that "char must be able to contain any UTF-8 character that is exactly 8 bit long", meaning it never needs to set the first bit to 1 and can be just as well signed or unsigned

Can you explain it in detail ?

It depends on you platform. But in general on most platforms - 1 is just uint max. For example if we use https://en.wikipedia.org/wiki/Two%27s_complement for representation of signed int we'll have 111 for -1, but in uint the same value means 5.

Indeed the only thing specified is that "char must be able to contain any UTF-8 character that is exactly 8 bit long", meaning it never needs to set the first bit to 1 and can be just as well signed or unsigned

Not a UTF-8 character, but a UTF-8 code point

It depends on you platform. But in general on most platforms - 1 is just uint max. For example if we use https://en.wikipedia.org/wiki/Two%27s_complement for representation of signed int we'll have 111 for -1, but in uint the same value means 5.

You can add switch to you compiler to warn or have an error in this case in gcc use -Wsign-conversion to have a warning

You can add switch to you compiler to warn or have an error in this case in gcc use -Wsign-conversion to have a warning

It doesn't even give the warning

It doesn't even give the warning

By default it doesn't. You need to enable it by adding flag.

It doesn't even give the warning

Try with -Wall

Try with -Wall

Nothing happens

How to take memory from bulk of memory (at 1st time bulk memory allocation through malloc

It complies successfully with no warning

At requested times

Try with -Wall

-Wconversion is not part of - Wall. You need to have Wsign-conversion.

It complies successfully with no warning

Try -Wsign-conversion from https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

Not a UTF-8 character, but a UTF-8 code point

Then it is a Utf8 code point of 7 bits

-Wconversion is not part of - Wall. You need to have Wsign-conversion.

Ok, thanks. Sorry for being wrong about it

Try -Wsign-conversion from https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

Wait let me try this

Try -Wsign-conversion from https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

Thanks I can see the warning now using "Wsign-conversion" but don't i get an error for this ? If no then why ? Because I'm storing the negative value in unsigned int and when it's totally opposite

Thanks I can see the warning now using "Wsign-conversion" but don't i get an error for this ? If no then why ? Because I'm storing the negative value in unsigned int and when it's totally opposite

-W enables warning if you want it be error use -Werror=sign-conversion or, even better, use -Werror to make all warnings errors

-W enables warning if you want it be error use -Werror=sign-conversion or, even better, use -Werror to make all warnings errors

Okay thanks 😊

&MainWindow::ShowPost has not the type you've written

Fixed it. void GetData(QUrl url, auto callback); And then => GetData(QUrl("url"), &MainWindow::callback) ;)

Fixed it. void GetData(QUrl url, auto callback); And then => GetData(QUrl("url"), &MainWindow::callback) ;)

Do you use C++20?

Do you use C++20?

Hmmm. Honestly, I don't know! lol Let me see

Hey guys

Hmmm. Honestly, I don't know! lol Let me see

because auto in function arguments is available only since C++20

in lambda expression parameters since C++14

because auto in function arguments is available only since C++20

It means I don't need to claim the type of new function arg when I claim a function?

because auto in function arguments is available only since C++20

Hmmm. It's so nice... So it must be something more than 20.

Hmmm. It's so nice... So it must be something more than 20.

>Laplace demon entered the chat

>Laplace demon entered the chat

?Laplace transformation?

?Laplace transformation?

google it up it has it's own wikipedia page

Ok

Hi guys! Where do I learn how to write clear and readable code in C++?

I'm looking for a sort of official docs or something like this

I'm looking for a sort of official docs or something like this

There is a core guidelines for C++ coding in github and also there a "code complete" book They should be easy to find

I'm looking for a sort of official docs or something like this

There is an official page on coding guidelines for C++ https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines

Thank you

Is there anybody use "sololearn" app? And is it great to learn programming?

I'm looking for a sort of official docs or something like this

And I would really recommend https://www.oreilly.com/library/view/effective-modern-c/9781491908419/ It's not "official", but it so widely used and highly regarded as practically official guidelines.

Is there anybody use "sololearn" app? And is it great to learn programming?

Is a good app that gives you basic skills. You can learn more later

I'm looking for a sort of official docs or something like this

For the docs part cppreference.com

Is a good app that gives you basic skills. You can learn more later

Where can i learn later is YouTube vid works?

guys fstream doesnt work why https://paste.pics/AX1IW

guys fstream doesnt work why https://paste.pics/AX1IW

Where have you coded?

Website or VS kinda?

vscode sir

vscode sir

do ofstream not fstream

vscode sir

fstream consists ifstream(file reading) and ofstream(file opening)

Hi guys! Where do I learn how to write clear and readable code in C++?

Read Mayer's books Read C++ Core Guidelines Watch Jason Turner's, Kate Gregory's and others talks

guys fstream doesnt work why https://paste.pics/AX1IW

Did it help?

Did it help?

ld.exe: cannot open output file output\main.exe: Permission denied got this error sir

it compiled but still gives open and write error messages

I cleaned executable and objects now works.

I cleaned executable and objects now works.

Ok

hello

I will calculate the C ++ term average. can you help me?

I will calculate the C ++ term average. can you help me?

Store the numbers in an array, add them and then divide by the array length.

hello

Abdirahman Don't send PMs that ask for solutions to your homework. I personally, as someone who teaches, find it worse than not doing it yourself

Abdirahman Don't send PMs that ask for solutions to your homework. I personally, as someone who teaches, find it worse than not doing it yourself

Should I warn him?

🤚

Hi I need some help in coding plz