캐쉬백 프로그램

miniProject01\cashBack.java

/*
 작성자: 고지민
*/
//cashback
//code with oracle openjdk 1.8
import java.util.*;
public class Main {
    public static void main(String[] args) {
        System.out.println("[캐시백 계산]");


        Scanner input= new Scanner(System.in);
        int pay= checkInt("결제 금액을 입력해 주세요.(금액):",input,0);
        int cashback_percent=10;
        int cashback=(pay*cashback_percent/100)/100*100;
        System.out.printf("결제 금액은 %d원이고, 캐시백은 %d원 입니다. ",pay,Math.min(300,cashback));
    }
    public static int checkInt(String message,Scanner input,int min){
        try {
            System.out.print(message);
            int value = input.nextInt();
            if (value<min){
                throw new Exception();
            }
            return value;
        }
        catch (Exception e){
            System.out.println("다시 입력해주세요");
            return checkInt(message,input,min);
        }
    }
}