How to Fix 'undefined reference to WinMain' Error in C

When compiling C code with gcc, you may encounter the error undefined reference to `WinMain', collect2.exe: error: ld returned 1 exit status; the detailed message typically appears as follows:

omitted...
:crt0_c.c:(.text.startup+0x2e): undefined reference to `WinMain'
collect2.exe: error: ld returned 1 exit status

This error indicates that the C code lacks an entry function, specifically the main() function. Please add a main() function to your C program:

int main(int argc, char* argv[]) {

}

For newly written code, please verify that it has been saved.