java简易计算器（无法累计计算，练手）

package com.moneypine.method;

import java.util.Scanner;

public class Demo07 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        //控制输入条件及对象
        System.out.println("输入第一个数字");
        double a = scanner.nextDouble();
        System.out.println("选一个：+,-,*,/");
        char b = scanner.next().charAt(0);
        System.out.println("输入第二个数字");
        double c = scanner.nextDouble();

        scanner.close();

        //判断输入符号，调用加减乘除方法
        switch (b) {
            case '+':
                double reslut_add = add(a,b,c);
                System.out.println(reslut_add);
                break;
            case'-':
                double result_minus = minus(a,b,c);
                System.out.println(result_minus);
                break;
            case'*':
                double result_mutiply = multiply(a,b,c);
                System.out.println(result_mutiply);
                break;
            case'/':
                double reslut_divide = divide(a,b,c);
                System.out.println(reslut_divide);
                break;

        }
    }
    //包装每一个方法类
    public static double add(double a,char b,double c){
        return a + c;
    }
    public static double minus(double a,char b,double c){
        return a - c;
    }
    public static double multiply(double a,char b,double c){
        return a * c;
    }
    public static double divide(double a,char b,double c){
        return (a/c);
    }
}