package com.wpc; /* --- coding = utf-8 --- * @Time: 2020/8/6 18:34 * @Author: 1807310509 * @File: Arithmometer.java * @Software: IntelliJ IDEA */ public class Arithmometer { private static double result; public Arithmometer() { } public static double calculator(Double num1,String sign,Double num2) { switch (sign) { case "+": result = num1 + num2; break; case "-": result = num1 - num2; break; case "*": result = num1 * num2; break; case "/": result = num1 / num2; } return result; } }