计算器的简单实现

java实现简单的计算器功能

package com.su.jichu;

import com.sun.xml.internal.ws.api.model.wsdl.WSDLOutput;

import java.util.Scanner;

public class jsq {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double a = scanner.nextInt();
        char c = scanner.next().charAt(0); //将获取到的第一个char类型赋值给b
        double b = scanner.nextInt();
        System.out.println(a+""+""+c+""+b);
        switch (c){
            case '+' : jia(a,b);   break;
            case '-': jian(a,b);  break;
            case '*' : chen(a,b);  break;
            case '/' : chu(a,b);   break;
            default:
                System.out.println("输入有误！！");
                break;
        }
    }
    public static void jia(double a,double b)
    {
        double sum  =a + b;
        System.out.println("sum="+sum);

    }
    public  static  void jian(double a,double b)
    {
        double sum=0;
        if(a>b){
        sum=a-b;
        }else{
          sum=-(b-a);
        }
        System.out.println("sum="+sum);

    }
    public static void chen(double a,double b)
    {
        double sum = a*b;
        System.out.println("sum="+sum);

    }
    public static void chu(double a,double b)
    {
        double sum = a /b;
        System.out.println("sum="+sum);

    }
}