#include<stdio.h>
#include <time.h>


int main()
{
	long i=0;
	float j=0;
	clock_t start_clock=clock();
	time_t start_time=time(NULL);
	for(i=0;i<100000000;i++)
	{
		j=(float)i*213124/200000;

	}
	//sleep(3);
	printf("processor time used is:%g sec. ,j= %d \n",(clock()-start_clock)/(double) CLOCKS_PER_SEC,j);
	printf("Running time :%g sec. \n",difftime(time(NULL),start_time));
	return 0;
}
 

程式執行結果：

processor time used is:0.71 sec. ,j= 1073741824 
Running time :1 sec. 

time記錄的是整個程式從開始執行到最後結束所消耗的時間