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工作学习 / IT技术讨论 / 我想测试一段C++程序的运行速度，有什么函数可以得到当前时间？或在windows(dos)/Unix下分别有什么命令可以测试程序运行的时间？
-smallwhale(喝不了咖啡);
2003-2-17
(#1046319@0)
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GetSystemTime
-lusi(丑小鸭);
2003-2-17
(#1046349@0)
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能详细点吗？这是函数还是命令名？
-smallwhale(喝不了咖啡);
2003-2-17
(#1046407@0)
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there might be some other functions which can do the work, but the following is the one I prefer.SYSTEMTIME startTime;
GetSystemTime(&starTime);
..... // your code which you want to time
SYSTEMTIME endTime;
GetSystemTime(&endTime);
double elapsed = (endTime.wSecond + endTime.wMilliseconds / 1.0e3) - (startTime.wSecond + startTime.wMilliseconds / 1.0e3); // time in seconds
-lusi(丑小鸭);
2003-2-17
{289}
(#1046417@0)
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谢谢，在哪个library里？
-smallwhale(喝不了咖啡);
2003-2-17
(#1046467@0)
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faint. do you not have MSDN? "Declared in Winbase.h; include Windows.h."
-lusi(丑小鸭);
2003-2-17
(#1046469@0)
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因为我要运行在不同操作系统下，所以我只用standard C/C++里的东西，所以不熟悉windows的库。不过测试无所谓。Anyway谢谢
-smallwhale(喝不了咖啡);
2003-2-17
(#1046486@0)
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clock() might be the one of Standard C.
-lusi(丑小鸭);
2003-2-17
(#1046498@0)
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linux下面命令， #times <函数>times Print the accumulated user and system times for the
shell and for processes run from the shell. The
return status is 0.
-gettext(gettext);
2003-2-17
{160}
(#1047005@0)
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GetTickCount(), return in ms
-enchanted(密码);
2003-2-18
(#1047969@0)