c++利用windows函數(shù)實(shí)現(xiàn)計(jì)時(shí)范例
計(jì)時(shí)怎樣利用代碼實(shí)現(xiàn)呢？以下是為大家分享的c++利用windows函數(shù)實(shí)現(xiàn)計(jì)時(shí)范例，供大家參考借鑒，歡迎瀏覽!
復(fù)制代碼 代碼如下:
/pic/p>
#include
#include
#include/pic/p>
#include/pic/p>
#pragma comment(lib, "Winmm.lib") /pic/p>
/pic/p>
int main()
{ /pic/p>
time_t timeBegin, timeEnd;
timeBegin = time(NULL);
Sleep(1000);
timeEnd = time(NULL);
printf("%dn", timeEnd - timeBegin);
/pic/p>
clock_t clockBegin, clockEnd;
clockBegin = clock();
Sleep(800);
clockEnd = clock();
printf("%dn", clockEnd - clockBegin);
/pic/p>
DWORD dwBegin, dwEnd;
dwBegin = timeGetTime();
Sleep(800);
dwEnd = timeGetTime();
printf("%dn", dwEnd - dwBegin);
/pic/p>
DWORD dwGTCBegin, dwGTCEnd;
dwGTCBegin = GetTickCount();
Sleep(800);
dwGTCEnd = GetTickCount();
printf("%dn", dwGTCEnd - dwGTCBegin);
/pic/p>
LARGE_INTEGER large_interger;
double dff;
__int64 c1, c2;
QueryPerformanceFrequency(&large_interger);
dff = large_interger.QuadPart;
QueryPerformanceCounter(&large_interger);
c1 = large_interger.QuadPart;
Sleep(800);
QueryPerformanceCounter(&large_interger);
c2 = large_interger.QuadPart;
printf("本機(jī)高精度計(jì)時(shí)器頻率%lfn", dff);
printf("第一次計(jì)時(shí)器值%I64dn第二次計(jì)時(shí)器值%I64dn計(jì)時(shí)器差%I64dn", c1, c2, c2 - c1);
printf("計(jì)時(shí)%lf毫秒nn", (c2 - c1) * 1000 / dff);
return 0;
}
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