猜字游戏，随机数的产生，二分法查找

6．            猜字游戏，随机数的产生，二分法查找

 

/*玩猜字游戏*/

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

main()

{

       /*定义变量，num存储随机变量，i存储输入值*/

       int num,i;

       /*产生随机数种子*/

       srand(time(NULL));

       /*产生随机数，并存入变量num*/

       num=rand()%1000+1;

       printf("I have a num between 1 and 1000.\n");

       printf("Can you guess my num?\n");

       printf("Please type you first guess.\n");

       scanf("%d",&i);

       /*当猜测不正确时，选择打印提示*/

       while(i!=num)

       {

              if(i>num)

                     printf("Too high. Try again.\n");

              else

                     printf("Too low. Try again.\n");

              scanf("%d",&i);

       }

       printf("Excellent! You guess the number!\n");

       printf("Woule you like to play again(y or n)?\n");

return(0);

}

运行效果如图: