尝试在 vs code 中安装和运行 C++ 测试代码

Question

Hi guys i installed the vs code and downloaded the needed extensions (C/C++-code runner) and i installed Mingw but when i run this test code

    #include <iostream>
using namespace std;

int main() {
  cout << "Hello World!";
  return 0;
}

it shows this

PS C:\Users\faroo\Desktop\C++ 101> cd "c:\Users\faroo\Desktop\C++ 101\" ; if ($?) { g++ calssCar.cpp -o calssCar } ; if ($?) { .\calssCar }
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-crt0_c.o): in function `main':
C:/_/M/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crt0_c.c:18: undefined reference to `WinMain'
collect2.exe: error: ld returned 1 exit status

can you please help me

Answer 1

The compiler is working fine but the linker trying to link it as a Windows GUI App, which uses WinMain() instead of main() as entry point of application.

You should recheck your compiler flags in vsCode settings. If I remember properly, for Mingw-w64, the flag is -mwindows .

I suspect you probably used some template to create vscode project but chose the wrong one (gui app instead of console app)

Also, as a beginner I would recommend using TDM-GCC instead of msys2, as it's better intergreted with Windows and is easier to work with.

Answer 2

1. one thing i noticed is IF YOU RUN YOUR CODE WITHOUT SAVING it is giving this error.

try RUN after saving

Answer 3

I suggest you create a new cpp file with another title.Then copy your code to the new file.Try to run the code in the new file again.Maybe it can works. Such error usually happen to my laptop.It dosen't matter.

Answer 4

It's because maybe you haven't set your path of Mingw. Let me guide you to do that if you're using Windows:

1. Install Mingw (which you already have), like I have installed it in C:\Mingw
2. Then open Mingw\bin folder from that drive, like I have opened C:\MinGW\bin
3. Copy "C:\MinGW\bin" and then open This Pc.
4. Right-click on open space and click properties.
5. Go to Advanced system settings.
6. Click on the Environment variable.
7. Then in system variables, double click on PATH.
8. Click on new, and paste your path there.
9. Press ok and now run your code again in Vscode, it'll surely work!