个人小项目——四则运算器小游戏

 1 package pro1;
 2 
 3 import java.util.Random;
 4 import java.util.Scanner;
 5 
 6 public class EleArithmetic {
 7     public static boolean flag;
 8     public static int score=0;
 9     public static void show_main(){
10         System.out.println("1.直接开始下一题\n2.显示结果\n3.累计分数(一道题5分)\n4.结束");
11         System.out.println("请输入你的选择：");
12     }
13     public static String compare(double result){
14         System.out.println("请输入结果：");
15         Scanner scan=new Scanner(System.in);
16         double scan1=scan.nextDouble();
17         if(result==scan1){
18             flag=true;
19             score=score+5;
20             return "恭喜你算对了！";
21         }else{
22             flag=false;
23             return "很遗憾，你答错了！";
24         }
25     }
26     public static void main(String[] args) {
27         System.out.println("请选择要随机生成的算法：");
28         System.out.println("1.加法\t2.减法\t3.乘法\t4.除法\t");
29         Scanner sc=new Scanner(System.in);
30         int s=sc.nextInt();
31         double result=0;
32         Random r=new Random();
33         int a=r.nextInt(100);
34         int b=r.nextInt(100);
35         while(b==0){
36             b=r.nextInt(100);
37         }
38         switch(s){
39         case 1:
40             System.out.println(a+"+"+b+"=?");
41             result=a+b;
42             System.out.println(compare(result));
43             show_main();
44             break;
45         case 2:
46             System.out.println(a+"-"+b+"=?");
47             result=a-b;
48             System.out.println(compare(result));
49             show_main();
50             break;
51         case 3:
52             System.out.println(a+"*"+b+"=?");
53             result=a*b;
54             System.out.println(compare(result));
55             show_main();
56             break;
57         case 4:
58             System.out.println(a+"/"+b+"=?");
59             float c=a;
60             float d=b;
61             result=c/d;
62             System.out.println(compare(result));
63             show_main();
64             break;
65         default:
66             System.out.println("输入有误，重新开始！");
67             main(null);
68             break;
69         }
70         Scanner sc1=new Scanner(System.in);
71         int s1=sc1.nextInt();
72         switch(s1){
73         case 2:
74             System.out.println("本题的结果："+result);
75             main(null);
76             break;
77         case 1:
78             main(null);
79             break;
80         case 3:
81             System.out.println("当前总分数："+score);
82             main(null);
83             break;
84         case 4:
85             System.out.println("当前总分数："+score);
86             System.out.println("谢谢参与！");
87             break;
88         default:
89             System.out.println("输入有误，重新开始！\n");
90             main(null);
91             break;
92         }
93         
94     }
95 }