Hi I have query in c++ I have a double number suppose 1.45678384 i want that double takes only four digits after decimal number what is the methods

default floating point types do not have variable resolution. If you need fixed decimal point you will need to program it yourself

how to set entire boolean array to have false value in declaration ? or the entire array is false by default ?

.. = {false};

thank you guys

.. = {false};

bitset<n> x{}; also ok

Hello, I am a new C/CPP programmer and I have some questions that I need answered now. After learning C/Cpp, will I be able to create programs like wine and proton used in Steam Deck? I also have a question: How is wine built? What is its idea? I also have a question. People say that if you learn C, CPP, and the basics of computer science, you will be able to program anything, whatever, after learning and mastering them, and you will understand every 0 and 1 in front of you. Is this correct? If so, then I hope someone can help me as I enter the field of computer science.

Hello, I am a new C/CPP programmer and I have some questions that I need answered now. After learning C/Cpp, will I be able to create programs like wine and proton used in Steam Deck? I also have a question: How is wine built? What is its idea? I also have a question. People say that if you learn C, CPP, and the basics of computer science, you will be able to program anything, whatever, after learning and mastering them, and you will understand every 0 and 1 in front of you. Is this correct? If so, then I hope someone can help me as I enter the field of computer science.

For 1, you'll need to learn a lot of other things other than c/cpp. For 2, check wine docs and source For 3, no, that's just romanticizing stuff, you'll need to learn a lot, and even then you won't understand everything.

There are reasons why we need advanced programming language, and one of them is to avoid looking directly into 01010101😜

For 1, you'll need to learn a lot of other things other than c/cpp. For 2, check wine docs and source For 3, no, that's just romanticizing stuff, you'll need to learn a lot, and even then you won't understand everything.

Can you help me with other things I need to learn? Or Roadmap

Can you help me with other things I need to learn? Or Roadmap

Check pin message and #res

Can you help me with other things I need to learn? Or Roadmap

#res

Can you help me with other things I need to learn? Or Roadmap

Please check out this channel - @Resources for information on learning sources for C and C++ (books and videos) and Frequently Asked Questions.

what is the default value of int in struct data ? is it 0 ? i would usually do something like "int a=0", but in struct i cant do that, so is the default value of int in struct is 0 ? in c btw

？

what is the default value of int in struct data ? is it 0 ? i would usually do something like "int a=0", but in struct i cant do that, so is the default value of int in struct is 0 ? in c btw

Firstly, you can (since C++11): struct A { int a = 5; }; Secondly, it depends on where you will create an object with this struct type. If like global variable then its value is guaranteed to be 0 (since bss segment will be zeroed at program startup). If it is local variable then it will store some garbage (because it will be very expensive to set 0 to local (on stack) variables each time)

I was about to answer, but I found that you answered faster and better than me.😂

Firstly, you can (since C++11): struct A { int a = 5; }; Secondly, it depends on where you will create an object with this struct type. If like global variable then its value is guaranteed to be 0 (since bss segment will be zeroed at program startup). If it is local variable then it will store some garbage (because it will be very expensive to set 0 to local (on stack) variables each time)

i cant do that in c. thank you so much, make it global variable solve my problem

in c, you can also use struct A a1 = {0, 0} to explicitly initialize the local struct variables

And I strongly recommend this method, unless you have to make it globally

woww thank you this is what im looking for

And I strongly recommend this method, unless you have to make it globally

yes, i dont use global variable normally

in c, you can also use struct A a1 = {0, 0} to explicitly initialize the local struct variables

Or just A a1 = {};

Not enough arguments!

How do I cross compile for windows on Linux?

How do I cross compile for windows on Linux?

I want a built in Linux command to make it instead of searching and needing to manually download some other tool

How do I cross compile for windows on Linux?

Cmake?

Cmake?

Does that make windows compatible binaries?

Does that make windows compatible binaries?

Yes, if you do some code for windows. if(UNIX) # your CMAKE code elseif(WIN32) # your CMAKE code endif()

Does that make windows compatible binaries?

Also it is common for unix to install packages, so you include it like find_package(package_name), but for windows you need to include path include_directories("path")

make it for linux and use it on windows with wsl

How do I cross compile for windows on Linux?

Premake

make it for linux and use it on windows with wsl

Or make it for windows and use wine :D

Cmake?

No. This is just a constructor for convenience

please read the group name, then group rules and then delete your offtopic messages, thank you

User biochem has 1/2 warnings; be careful! Reason: offtop

Does that make windows compatible binaries?

clang (using —target) ?

clang (using —target) ?

gcc

gcc

on linux there's a package called something like mingw-gcc.

do a search in your package manager

on linux there's a package called something like mingw-gcc.

my original question has alr been answered but thanks for the help anyway

hi everyone,im using msys2 to run g++ on windows10 but when i use g++ to compile c++ file, i got this C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello>g++ hello.cpp -Wl,--verbose Supported emulations: i386pep i386pe collect2.exe: error: ld returned 116 exit status version info mingw-w64-ucrt-x86_64-gcc 13.2.0-5 mingw-w64-ucrt-x86_64-binutils 2.42-1 how could i gather more debug information?

I looks like your linker support i386 only

I looks like your linker support i386 only

Doesn’t that mean 32 bit processor

Doesn’t that mean 32 bit processor

yes

The translator seems to be broken 😅

I also collect x32 attachments. they will run everywhere

yes

Don’t 64 bit processors have the capability to run 32 bit programs

Don’t 64 bit processors have the capability to run 32 bit programs

I did not explain it correctly. I have a translator who even put money in the offer

/report

/report

Reported to admins.​​​​​​​​​​​

Reported to admins.​​​​​​​​​​​

/report

Why?

Read the rules no hello

It is mentioned in the 2nd paragraph

Read the rules no hello

Wrong rule i guess. It is hard to imagine any networking event, where people do not greet each other

Wrong rule i guess. It is hard to imagine any networking event, where people do not greet each other

This group is not a networking event https://nohello.net/en/

Wrong rule i guess. It is hard to imagine any networking event, where people do not greet each other

If you want to greet others and talk about anything just join the ot group and say whatever you want as long as you are following the ot groups rules which are not taken that seriously as they are in the official group

hi everyone,im using msys2 to run g++ on windows10 but when i use g++ to compile c++ file, i got this C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello>g++ hello.cpp -Wl,--verbose Supported emulations: i386pep i386pe collect2.exe: error: ld returned 116 exit status version info mingw-w64-ucrt-x86_64-gcc 13.2.0-5 mingw-w64-ucrt-x86_64-binutils 2.42-1 how could i gather more debug information?

casualcode\cpp\hello on  main ❯ c:\msys64\ucrt64\bin\g++.exe -g C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello\hello.cpp -o C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello\hello.exe '-Wl,--verbose' -static-libstdc++ Supported emulations: i386pep i386pe casualcode\cpp\hello on  main ❯ ls Directory: C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello Mode LastWriteTime Length Name ---- ------------- ------ ---- -a--- 4/8/2024 7:51 PM 298 hello.cpp -a--- 4/11/2024 10:18 PM 2914740 hello.exe casualcode\cpp\hello on  main ❯ .\hello.exe Hello C++ World from VS Code and the C++ extension! casualcode\cpp\hello on  main ❯ c:\msys64\ucrt64\bin\g++.exe -g C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello\hello.cpp -o C:\Users\Jose\Documents\GitHub\casualcode\cpp\hello\hello.exe '-Wl,--verbose' Supported emulations: i386pep i386pe collect2.exe: error: ld returned 116 exit status casualcode\cpp\hello on  main took 3s ❯

some more info: if static-libstdc++ is passed, it works im tryna learn to use something like strace, wish me luck

Hi, why standard can't just stricly define that enum underlying type should be for example int? What is the point that compliers can choose which integer type to use under enum? This creates many ambiguous situations

Don't ask stupid questions

Hi, why standard can't just stricly define that enum underlying type should be for example int? What is the point that compliers can choose which integer type to use under enum? This creates many ambiguous situations

Is this a question or a statement?

Is this a question or a statement?

question

Hi, why standard can't just stricly define that enum underlying type should be for example int? What is the point that compliers can choose which integer type to use under enum? This creates many ambiguous situations

Because it allows to optimize the width of the underlying type based on the enumerators and their values

Because it allows to optimize the width of the underlying type based on the enumerators and their values

because of this we have bug on msvc 🙃: https://walac.github.io/curious-bug-enum-bitfield/

because of this we have bug on msvc 🙃: https://walac.github.io/curious-bug-enum-bitfield/

You have the bug in msvc not because of the standard but because of Microsoft employees

MSVC is a bug in itself

I'm hoping someday Microsoft gonna bury this thing and use clang, as Intel did

Are there any advantages of using msvc over clang, though? Except ergonomics

MSVC has better support of newer standards

I'm hoping someday Microsoft gonna bury this thing and use clang, as Intel did

what about gcc/g++? I know that clang has better errors in some cases

MSVC has better support of newer standards

Where is the support for C++ 23 compiler features ?

Even Apple clang is ahead of MSVC in terms of compiler features … 😅

clang one love

Even Apple clang is ahead of MSVC in terms of compiler features … 😅

Well, at least MSVC is more consistent now, clang/gcc add support to newer features, but for very long time don't support some stuff from older standards

Well, at least MSVC is more consistent now, clang/gcc add support to newer features, but for very long time don't support some stuff from older standards

What standards? GCC has a full support for C++ 20 and GCC 14 has nearly a full support for C++ 23

Even Apple clang is ahead of MSVC in terms of compiler features … 😅

Not really true. MSVC may be shitty at optimization, but it is very up to date. For example, GCC still does not have a compliant version of the from_chars and to_chars for floating points and uses sprintf under the hood

The implementation of concepts is also a bit weird at times, with some unhandled cases I can't remember

MSVC are not catching up on the compiler side of c++23, but have almost all library items including a bunch missing from both clang and gcc

Not really true. MSVC may be shitty at optimization, but it is very up to date. For example, GCC still does not have a compliant version of the from_chars and to_chars for floating points and uses sprintf under the hood

No, it is true

Not really true. MSVC may be shitty at optimization, but it is very up to date. For example, GCC still does not have a compliant version of the from_chars and to_chars for floating points and uses sprintf under the hood

I am not talking about library implementation, but compiler implementation. What features MSVC compiler supports from C++23? Partial implementation of deducing this, consistent character encoding support for utf8 as portable source file encoding and couple more features and that’s about all 😅😅😅😅😅

No, it is true

Look at the library items now