자바 응용 과제 - 환율 (원화를 달러로 환산 후 환전 금액과 거스름돈을 계산해서 출력)

package hwbinary;

import java.util.Scanner;

public class ExchangeRate {

	public static void main(String[] args) {
		
		double input, exchangeRate = 1120, exchange;
		
        int return_us, return_kor;
        
        Scanner myInput = new Scanner (System.in);
        
        
        System.out.print("won : ");        
        input = myInput.nextDouble();
        
        exchange = input / exchangeRate;    
        return_us = (int)exchange;
        exchange = exchange - return_us;
        return_kor = (int)(exchange * exchangeRate);
        return_kor = return_kor - (return_kor % 10);
        
       
        System.out.println("Exchange amount : " +" $" +  return_us);
        System.out.println("change : " + return_kor + " won");
	}

}