随机生成的300道四则运算

随机生成的300道四则运算

 1 import java.util.Random;
 2 
 3 public class Gao {
 4 
 5     public static void main(String[] args) {
 6         // TODO Auto-generated method stub
 7         
 8         char f[] = {'+','-','*','/'}; 
 9           int max =100; 
10           for(int i=0;i<300;i++){
11           Random random= new Random();
12           int a = random.nextInt(max+1);
13           int b = random.nextInt(max+1);
14           int c = random.nextInt(4);
15           int result = -1;
16           switch (c){
17           case 0:
18            result = a+b;
19            break;
20           case 1:
21            result = a-b;
22            break;
23           case 2:
24            result = a*b;
25            break;
26           case 3:
27            while (true){
28             if (a!=0&&b!=0&&a%b==0){
29              result = a/b;
30              break;
31             }else{
32               a = random.nextInt(max+1);
33               b = random.nextInt(max+1);
34             }
35            }
36            break;
37            default:
38            break;
39           }
40           System.out.println(""+a+f[c]+b+"=");
41          }
42         }
43 
44     }

 

posted on 2017-03-11 15:34  21-gmy  阅读(113)  评论(2)  编辑  收藏  举报

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