#include<time.h>
LARGE_INTEGER timeStart;
LARGE_INTEGER timeEnd;
LARGE_INTEGER frequency;
double quadpart;
QueryPerformanceFrequency(&frequency);
quadpart = (double)frequency.QuadPart;
QueryPerformanceCounter(&timeStart);
xxxxxxx // the function been tested
QueryPerformanceCounter(&timeEnd);
int32_t time = 1000 * (timeEnd.QuadPart - timeStart.QuadPart) / quadpart; // ms
ofstream outfile("d://testRunTime.txt", ios::app);
if (outfile.is_open())
{
outfile<<"run time is "<<time<<endl;
}
outfile.close();
c++ 程序计时
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转载自blog.csdn.net/myzhouwang/article/details/83861000
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