#include <windows.h>
#include <stdio.h>

#define MEASURING

#ifdef MEASURING
static VOID StopWatch(LPCSTR Name OPTIONAL)
{
    static FILETIME s_ft0;
    FILETIME ft1;
    DWORD diff;

    if (!Name)
    {
        GetSystemTimeAsFileTime(&s_ft0);
    }
    else
    {
        GetSystemTimeAsFileTime(&ft1);
        diff = ft1.dwLowDateTime - s_ft0.dwLowDateTime;
        printf("%s: %lu\n", Name, diff);
    }
}
#endif

int main(void)
{
#ifdef MEASURING
    StopWatch(NULL);
    Sleep(1000);
    StopWatch("Sleep(1000)");
#endif
    return 0;
}