java编写的小学数学四则运算出题系统。_小学算术四则运算测试程序java

1.主类

 
import java.util.Random;
import java.util.Scanner;
/**
 * @version 1.0
 * function:
 * author：阿卜杜赛麦提
 * @date：2022/12/24 15:15
 */
public class A05 {
    public static void main(String[] args) {
        Calculate cal=new Calculate();
        while (true){
            cal.show();
        }
    }
}

2.Calculate类

class Calculate{
    public void show(){
        Random random=new Random();
        int aaa=random.nextInt(10);
        int bbb=random.nextInt(10);
        Cale cale=new Cale(aaa,bbb);
        Scanner scanner=new Scanner(System.in);
        int ran=random.nextInt(3);
        switch (ran){
            case 0:double a=cale.add();
                System.out.print(cale.a+"+"+ cale.b+"=");
                try {
                    int aa=scanner.nextInt();
                    if (a==aa){
                        System.out.println(cale.a+"+"+ cale.b+"="+a);
                        System.out.println("答对了");
                        break;
                    }else {
                        System.out.println("你输入的答案有误");
                        break;
                    }
                }catch (Exception e){
                    System.out.println("请输入整数");
                    break;
                }
 
            case 1:double b=cale.subtract();
                System.out.print(cale.a+"-"+ cale.b+"=");
                try {
                    int bb=scanner.nextInt();
                    if (b==bb){
                        System.out.println(cale.a+"+"+ cale.b+"="+b);
                        System.out.println("答对了");
                        break;
                    }else {
                        System.out.println("你输入的答案有误");
                        break;
                    }
                }catch(Exception e){
                    System.out.println("请输入整数");
                    break;
                }
 
            case 2:double c=cale.multiply();
                System.out.print(cale.a+"*"+ cale.b+"=");
                try {
                    int cc=scanner.nextInt();
                    if (c==cc){
                        System.out.println(cale.a+"+"+ cale.b+"="+c);
                        System.out.println("答对了");
                        break;
                    }else {
                        System.out.println("你输入的答案有误");
                        break;
                    }
                }catch (Exception e){
                    System.out.println("请输入整数");
                    break;
                }
 
            case 3:Double d=cale.divide();
                if (d==null){
                    System.out.println("输入有误");
                    break;
                }else {
                    System.out.print(cale.a+"/"+ cale.b+"=");
                    try {
                        int dd=scanner.nextInt();
                        if (d==dd){
                            System.out.println(cale.a+"+"+ cale.b+"="+d);
                            System.out.println("答对了");
                            break;
                        }else {
                            System.out.println("你输入的答案有误");
                            break;
                        }
                    }catch (Exception e){
                        System.out.println("请输入整数");
                        break;
                    }
 
                }
        }
    }
}

3.Cale类

class Cale{
    double a;
    double b;
    Cale(double a,double b){
        this.a=a;
        this.b=b;
    }
    public double add(){
        return a+b;
    }
    public double subtract(){
        return a-b;
    }
    public double multiply(){
        return a*b;
    }
    public Double divide(){
        if (b!=0){
            return a/b;
        }
        return null;
    }
}

运行结果：