package com.design.utils;

import java.math.BigDecimal;
import java.util.Scanner;

import org.junit.Test;

public class TestModel {
	
	/**
	 * 
	 * @param numA 數字A
	 * @param numB 數字B
	 * @param operate 運算子
	 * @return
	 */
	public double GetResult(double numA, double numB, String operate){
		double res = 0;
		BigDecimal bigA = new BigDecimal(Double.toString(numA));
		BigDecimal bigB = new BigDecimal(Double.toString(numB));
		switch (operate) {
			
			case "+":
				res = bigA.add(bigB).doubleValue();
				break;
			case "-":
				res = bigA.subtract(bigB).doubleValue();
				break;
			case "*":
				res = bigA.multiply(bigB).doubleValue();
				break;
			case "/":
				res = bigA.divide(bigB).doubleValue();
				break;
			default :
				System.out.println("運算子不合法~");
				break;
		}
		return res;
	}

	@Test
	public void testAccuracy(){
		try {
			Scanner sc = new Scanner(System.in);
			System.out.println("請輸入數字A:");
			double numA = sc.nextDouble();
			
			System.out.println("請選擇運算子(+、-、*、/):");
			String operate = sc.next();
			
			System.out.println("請輸入數字B:");
			double numB = sc.nextDouble();
			double getResult = GetResult(numA, numB, operate);
			
			System.out.println("結果是:" + getResult);
			
			sc.close();
		} catch (Exception e) {
			System.out.println("您的輸入有誤~" + e.getMessage());
		}
	}

}