java简易计算器

package com.Math;

import java.util.Scanner;

/**
 * @Author: dps
 * @Date: 2022/4/26 - 04 - 26 - 12:42
 * @Description: com.Math
 * @version: 1.0
 */
public class Demo04 {
    public static void main(String[] args){
        //制作简易计算器 加减乘除
        //扫描器
        Scanner scanner = new Scanner(System.in);

        System.out.println("输入第一个数：");
        double sum1 = scanner.nextDouble();

        System.out.println("输入运算符:");
        String ope = scanner.next();

        System.out.println("输入第二个数：");
        double sum2 = scanner.nextDouble();
        
        switch (ope){
            case "+":
                add(sum1,sum2);
                break;
            case "-":
            subtraction(sum1,sum2);
                break;
            case "*":
            multiplication(sum1,sum2);
                break;
            case "/":
                division(sum1,sum2);
                break;
            default:
                System.out.println("未知错误");
                break;
        }


        scanner.close();
    }

    //加法 方法
    double result = 0;
    public static void add(double a,double b){
         double result = a+b;
         System.out.println(result);
    }
    //减法 方法
    public static void subtraction(double a, double b){
        double result = a-b;
        System.out.println(result);
    }
    //乘法 方法
    public static void multiplication(double a,double b){
        double result = a*b;
        System.out.println(result);
    }
    //除法 方法
    public static void division(double a,double b){
        if(b==0){
            System.out.println("错误");
        }else {
            double result = a/b;
            System.out.println(result);
        }
    }

}