猜数字游戏

Posted 2021-01-11 one-piece-zxz

问题：在键盘里输入数字，判断是否等于随机数

思路：

1.首先生成一个随机数

1 int number  = (int)(Math.random()*101);

2.代码实现

 1 package Demo2;
 2 import java.util.Scanner;
 3 public class Demo3 {
 4 
 5     public static void main(String[] args) {
 6         
 7         int number  = (int)(Math.random()*101);
 8         Scanner input = new Scanner(System.in);
 9         
10         
11         int guess = -1;
12         
13         
14         while(guess!=number) {//        while 在无法确定判断条件的情况下，优先选用while
15             System.out.println("请输入你猜的数字：");//循环输入
16             guess = input.nextInt();
17             
18             if(guess==number) {
19                 System.out.print("yes,the number is "+number);
20                 break;// 如果猜对了，就跳出循环，break是跳出整个循环。
21             }
22             
23             else if(guess>number) {
24                 System.out.print("your guess is too high ");
25             }
26             
27             else 
28                 System.out.print("your guess is too low ");
29         }
30         
31         
32     }
33 }