java-的简易版计算器开发

package com.itheima.demo;

import java.util.Scanner;

public class Test1 {
    public static void main(String[] args) {
        //简易版计算器开发
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入第一个数字：");
        double num1 = sc.nextDouble();

        System.out.println("请输入第二个数字：");
        double num2 = sc.nextDouble();

        System.out.println("请输入运算符+-*/：");
        String operator = sc.next();

        double result = calc(num1, num2, operator);
        System.out.println("计算结果为：" + result);
    }

    public static double calc(double num1, double num2, String operator) {
        double result = 0;
        switch (operator) {
            case "+":
                result = num1 + num2;
                break;
            case "-":
                result = num1 - num2;
                break;
            case "*":
                result = num1 * num2;
                break;
            case "/":
                result = num1 / num2;
                break;
            default:
                System.out.println("输入的运算符有误！");
        }
        return result;
    }
}