全国计算机等级考试二级C语言程序设计实战(94)
题目：时间函数举例4,一个猜数游戏，判断一个人反应快慢。（版主初学时编的）
1.程序分析：程序源代码：
#include "time.h"
#include "stdlib.h"
#include "stdio.h"
main()
{char c;
clock_t start,end;
time_t a,b;
double var;
int i,guess;
srand(time(NULL));
printf("do you want to play it.(‘y‘ or ‘n‘) “n");
loop:
while((c=getchar())==‘y‘)
{
i=rand()%100;
printf("“nplease input number you guess:“n");
start=clock();
a=time(NULL);
scanf("%d",&guess);
while(guess!=i)
{if(guess>i)
{printf("please input a little smaller.“n");
scanf("%d",&guess);}
else
{printf("please input a little bigger.“n");
scanf("%d",&guess);}
}
end=clock();
b=time(NULL);
printf("“1: It took you %6.3f seconds“n",var=(double)(end-start)/18.2);
printf("“1: it took you %6.3f seconds“n“n",difftime(b,a));
if(var<15)
printf("“1“1 You are very clever! “1“1“n“n");
else if(var<25)
printf("“1“1 you are normal! “1“1“n“n");
else
printf("“1“1 you are stupid! “1“1“n“n");
printf("“1“1 Congradulations “1“1“n“n");
printf("The number you guess is %d",i);
}
printf("“ndo you want to try it again?(“"yy“".or.“"n“")“n");
if((c=getch())==‘y‘)
goto loop;
}
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