C语言计算程序运行时间有关问题
C语言计算程序运行时间问题
#include "stdio.h"
#include "stdlib.h"
#include "time.h"
int main(void)
{
long i = 10000000L;
clock_t start, finish;
double duration;
/*测量一个事件持续的时间*/
printf("Time to do %ld empty loops is ", i );
start = clock();
while(i--) ;
finish = clock();
duration = (double)(finish - start) / CLOCKS_PER_SEC;
printf("%f seconds\n ", duration);
system("pause");
}
1 楼
ggzwtj
2011-02-23
这个测得的时间是准确的吗？