vs 控制台输出

void __cdecl OutputDebugPrintf(const char* format, ...) {
    va_list vlArgs;
    char* strBuffer = (char*)GlobalAlloc(GPTR, 4096);
    va_start(vlArgs, format);
    //_vsnprintf(strBuffer, 4096 - 1, format, vlArgs);
    int size = strlen(strBuffer) -1;
    _vsnprintf_s(strBuffer, size, 4096 - 1, format, vlArgs);
    va_end(vlArgs);
    //strcat(strBuffer, "\n");
    strcat_s(strBuffer, size, "\n");//这里字符串必须以 '\n' 结尾
    OutputDebugStringA(strBuffer);
    GlobalFree(strBuffer);
    return;
}

//调用方法：
OutputDebugPrintf("hello world %d",123);

按下f5进入调试模式才能打印结果，如果不调试则看不到输出

 

// 头文件
#include <stdio.h>
#include <stdarg.h>