C语言经典代码——part 26

【程序93】

题目：时间函数举例3

1.程序分析：

2.程序源代码：

/*calculate time*/

#include "time.h"

#include "stdio.h"

main()

{ clock_t start,end;

int i;

double var;

start=clock();

for(i=0;i<10000;i++)

{ printf("\1\1\1\1\1\1\1\1\1\1\n");}

end=clock();

printf("\1: The different is %6.3f\n",(double)(end-start));

}

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【程序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：

2.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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