C语言时间函数

#include "time.h"
#include "stdio.h"
#include "stdlib.h"
int main()
{
    system ("color b2");
    time_t start,end;
    start = time(NULL);
    system("pause");
    end = time(NULL);
    printf("The pause used %-.2f seconds.\n",difftime(end,start));//<-
    system("pause");
    return ;
}  

//本文出自 “阿凡达” 博客，请务必保留此出处http://shamrock.blog.51cto.com/2079212/702547