linux c 时间函数，获取程序执行时间

#include <sys/time.h>

void ctimeTest()

{

int i=1000;

timeval tvs,tve,tvlast;

gettimeofday(&tvs,NULL);

while (--i)

{

system("cd");

}

gettimeofday(&tve,NULL);

long span = (tve.tv_sec-tvs.tv_sec) * 1000000 + (tve.tv_usec-tvs.tv_usec);

char temp[1024];

sprintf(temp,"use time: %d microsecond (1s = 1000000microsecond)",span);

printf(temp);

}

更多时间函数请参考：

http://www.ej38.com/showinfo/linux-203376.html

/article/7911000.html