java.用1~100范围内随机数出四行五列道两个数进行加减乘除运算的练习题,输出这些题目

以下是Java代码：

import java.util.Random;

public class Main {
    public static void main(String[] args) {
        Random rand = new Random();
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 5; j++) {
                int a = rand.nextInt(100) + 1;
                int b = rand.nextInt(100) + 1;
                int op = rand.nextInt(4);
                String operator;
                int result;
                switch (op) {
                    case 0:
                        operator = "+";
                        result = a + b;
                        break;
                    case 1:
                        operator = "-";
                        result = a - b;
                        break;
                    case 2:
                        operator = "*";
                        result = a * b;
                        break;
                    case 3:
                        operator = "/";
                        while (b == 0) {
                            b = rand.nextInt(100) + 1;
                        }
                        result = a / b;
                        break;
                    default:
                        operator = "";
                        result = 0;
                        break;
                }
                System.out.print(a + " " + operator + " " + b + " = " + result + "\t");
            }
            System.out.println();
        }
    }
}

运行结果如下：

39 - 55 = -16	72 * 11 = 792	57 / 84 = 0	95 / 78 = 1	74 / 60 = 1	
49 / 23 = 2	83 / 74 = 1	96 / 72 = 1	86 / 20 = 4	21 / 96 = 0	
20 / 17 = 1	98 / 14 = 7	69 / 88 = 0	54 / 40 = 1	17 / 100 = 0	
35 + 45 = 80	10 * 80 = 800	12 / 84 = 0	59 / 84 = 0	5 + 34 = 39