partTwo自动出题程序第一阶段

课堂测试1：像二柱子那样，花二十分钟写一个能自动生成30道小学四则运算题目的 “软件”

代码实现

import java.util.Random;
//import java.util.Scanner;

public class DemoTest {

    public static void main(String[] args) {
        Random rm=new Random();
        for (int i=0;i<30;i++){
            int number_3=rm.nextInt(4)+1;
            int number_1= rm.nextInt(100);
            int number_2=rm.nextInt(100);
                if(number_2==1){
                    System.out.println(number_1+"+"+number_2);
                }else if(number_3==2){
                    System.out.println(number_1+"-"+number_2);
                }else if (number_3==3){
                    System.out.println(number_1+"*"+number_2);
                }else if(number_3==4){
                    System.out.println(number_1+"/"+number_2);
                }
        }
    }
}