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  • 随机生成300道四则运算

     package demo;

    import java.util.Random;

    public class demo1 {

    public static void main(String args[]) {
           
            char f[] = { '+', '-', '*', '/' };
            int max=100;
            for (int i = 0; i < 300; i++) {
                Random random = new Random();
                int a = random.nextInt(max+1);
                int b = random.nextInt(max+1);
                int c = random.nextInt(4);
                int result=-1;
                switch (c) {
                case 0:
                    result=a+b;
                    break;
                case 1:
                    result=a-b;
                    break;
                case 2:
                    result=a*b;
                    break;
                case 3:
                    while (true) {
                    if (a!=0&&b!=0&&a%b==0) {
                        result=a/b;
                        break;
                    }   else {
                         a = random.nextInt(max+1);
                         b = random.nextInt(max+1);
                    }          
                    }              
                    break;
     
                default:
                    break;
                }
                System.out.println("" + a + f[c] + b + "=" +result );
                
                
              
            }
           
        }

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  • 原文地址:https://www.cnblogs.com/Ricardo-M-Lu/p/6526936.html
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