Java基础语法-小结，使用java写出一个计算器

使用之前的案例写出一个计算器

计算器案例

import java.util.Scanner;

public class Demo07 {
    public static void main(String[] args) {
        Scanner s =new Scanner(System.in);
        while (true){
            System.out.println("请输入第一个数");
            double a = s.nextDouble();
            System.out.println("请输入运算符");
            String type = s.next();
            System.out.println("请输入第二个数");
            double b = s.nextDouble();
            switch (type){
                case "+":
                    System.out.println("结果为："+add(a,b));
                    continue;
                case "-":
                    System.out.println("结果为："+less (a,b));
                    continue;
                case "*":
                    System.out.println("结果为："+Multiply(a,b));
                    continue;
                case "/":
                    System.out.println("结果为："+except(a,b));
                    continue;
                default:
                    System.out.println("无效的运算符");
            }
        }

    }
    public static double add (double a,double b){

        return a + b;
    }
    public static double less (double a,double b){

        return a - b;
    }
    public static double Multiply (double a,double b){

        return a * b;
    }
    public static double except (double a,double b){

        return a / b;
    }
    }