VC Preprocessor Definitions

1. Right-click on the project->setting->c/c++->preprocessor definitions
2. Add a custom precompiled header to the _SB2
3. Test code:

#include "stdafx.h"#include <stdio.h>#include <stdlib.h>int main(intchar* argv[]){#ifdef _SB    printf("调用了sb\n");#elif _SB2    printf("调用了sb2\n");#else    printf("Hello World!\n");#endif    return0;}

Output: SB2 was called

This method can be used to set the compilation of multiple versions, such as the debug version and release version of the difference, if you want to compile DEBUG1 version and DEBUG2 version, you can use the above method, without compiling two code.

VC Preprocessor Definitions