简单的java语言编写的计算器

简单的java语言编写的计算器

要求

1. 写四个方法，加减乘除
2. 利用循环+switch进行用户交互,判断用户输入的是哪个运算符
3. 传递需要操作的两个数
4. 输出结果

package net.yang.Exerises;

import java.util.Scanner;

public class computer {
    public static void main(String[] args) {
        System.out.println("请输入你想计算的次数：");
        Scanner t = new Scanner(System.in);
        int t1 = t.nextInt();
        for (int i = 0; i <t1; i++) {
            System.out.println("请输入第一个数");
            Scanner s1 = new Scanner(System.in);
            double x=s1.nextDouble();


            System.out.println("请输入运算符");
            Scanner s2 = new Scanner(System.in);
            String n=s2.nextLine();

            System.out.println("请输入第二个数");
            Scanner s3 = new Scanner(System.in);
            double y=s3.nextDouble();


            switch (n){
                case "+":
                    Add(x, y);
                    System.out.println("你输入的运算是加法运算");
                    break;
                case "-":
                    Substract(x, y);
                    System.out.println("你输入的运算是减法运算");
                    break;
                case "*":
                    Product(x, y);
                    System.out.println("你输入的运算是加法运算");
                    break;
                case "/":
                    Divide(x, y);
                    System.out.println("你输入的运算是加法运算");
                default:
                    System.out.println("你输入的运算符有误，请重新输入");
            }
        }

    }
    public static void  Add(double a,double b){
        double sum=a+b;
        System.out.println("结果是:"+a+"+"+b+"="+sum);
    }
    public static void Substract(double a,double b){
        double sum=a-b;
        System.out.println("结果是:"+a+"-"+b+"="+sum);
    }
    public static void Product(double a,double b){
        double sum=a*b;
        System.out.println("结果是:"+a+"*"+b+"="+sum);
    }
    public static void Divide(double a,double b){
        double sum=a/b;
        System.out.println("结果是:"+a+"/"+b+"="+sum);
    }

}