算法运行时间

[lzp729]

请问个位前辈,我在VC里面怎么可以知道我写的一个算法的运行时间啊?要求能精确到MS级的
怎么做呢?
希望大大帮帮我啊

[bobob]

GetTickCount();

[星辰游侠]

同意楼上的
或者多媒体定时类的timeGetTime

[lzp729]

谢谢
GetTickCount();
这个怎么用?

[星辰游侠]

The GetTickCount function retrieves the number of milliseconds that have elapsed since the system was started. It is limited to the resolution of the system timer. If you need a higher resolution timer, use amultimedia timer or a high-resolution timer.


DWORD time1 = GetTickCount();
//
你的算法
//
DWORD time2 = GetTickCount();
DWORD totalTime = time2 - time1;

totaltime就是你的算法运行时间

[truewill]

GetTickCount();
单位是毫秒

也可以用CTime和CTimespan

[bobob]

ULONG Time_mm =GetTickCount();
ULONG Time_sec =(Time_mm/1000)%60;
int Time_min =(Time_mm/(1000*60))%60;
int Time_hour =(Time_mm/(1000*60*60))%24;
int Time_day =(Time_mm/(1000*60*60*24));
cout<<Time_day<<" day(s) "<<Time_hour<<" hour(s) "<<Time_min<<" minute(s) "<<Time_sec<<"second(s).\n";

[oyljerry]

运行前和运行后分别GetTickCount
然后相减就得出了

[lzp729]

谢谢 谢谢