Microtime() 对于 C 和 C++ 等效吗？

我想知道 C 中是否有与 PHP 函数 microtime() 等效的函数andC++。我环顾四周，但找不到明确的答案。

Thanks!

没有与 PHP 的 microtime() 完全相同的函数，但您可以基于以下代码创建具有类似功能的函数：

Mac OS X 或许还有 Linux/Unix

#include <sys/time.h>
struct timeval time;
gettimeofday(&time, NULL); #This actually returns a struct that has microsecond precision.
long microsec = ((unsigned long long)time.tv_sec * 1000000) + time.tv_usec;

（基于：http://brian.pontarelli.com/2009/01/05/getting-the-current-system-time-in-milliseconds-with-c/ http://brian.pontarelli.com/2009/01/05/getting-the-current-system-time-in-milliseconds-with-c/)

Windows:

unsigned __int64 freq;
QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
double timerFrequency = (1.0/freq);

unsigned __int64 startTime;
QueryPerformanceCounter((LARGE_INTEGER *)&startTime);

//do something...

unsigned __int64 endTime;
QueryPerformanceCounter((LARGE_INTEGER *)&endTime);
double timeDifferenceInMilliseconds = ((endTime-startTime) * timerFrequency);

（达卡拉的回答，来自：https://stackoverflow.com/a/4568649/330067 https://stackoverflow.com/a/4568649/330067)