package com.xl.method;

import java.util.Scanner;

public class Calculator {
    public static void main(String[] args) {
        //建立物件呼叫函式
        Calculator calculator = new Calculator();
        //建立Scanner掃描物件,獲取使用者輸入資料
        Scanner scanner = new Scanner(System.in);

        //請輸入第一個資料
        System.out.println("請輸入一個數據： ");
        
 
double a =scanner.nextDouble();
        //請輸入運算子
        System.out.println("請輸入運算子：");
        String operator = scanner.next();
        //請輸入第二個資料
        System.out.println("請輸入第二個資料");
        double b = scanner.nextDouble();

        //儲存最終計算結果
        double result = 0;
        //關閉scanner資源
        scanner.close();
        
 
//根據輸入運算子呼叫不同的方法
        switch (operator){
            case "+"://呼叫加法
                result = calculator.add(a,b);
                System.out.println("結果為"+result);
                break;
            case "-"://呼叫減法1
                result = calculator.sub(a,b);
                System.out.println("結果為"+result);
                
 
break;
            case "*":
                result = calculator.multiply(a,b);
                System.out.println("結果為"+result);
                break;
            case "/":
                result = calculator.div(a,b);
                System.out.println("結果為"+result);
                break;
        }

    }

    //加法
    public double add (double a,double b){
        return a + b;
    }
    //減法
    public double sub (double a,double b){
        return a - b;
    }
    //乘法
    public double multiply (double a,double b){
        return a * b;
    }
    //除法
    public double div (double a,double b){
        return a / b;
    }




}