노재경_homework3.java

노재경
import java.text.NumberFormat;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final int FREE = 0;
        final int CHILD_DISCOUNT = 4000;
        final int SPECIAL_DISCOUNT = 8000;
        final int FULL_PRICE = 10000;

        Scanner scanner = new Scanner(System.in);

        System.out.println("[입장권 계산]");
        int age = getValidatedIntInput(scanner, "나이를 입력해주세요 (숫자): ");
        int time = getValidatedIntInput(scanner, "입장시간을 입력해주세요 (숫자): ");
        boolean isHonor = getYesOrNoInput(scanner, "국가유공자 여부를 입력해주세요");
        boolean isCard = getYesOrNoInput(scanner, "복지카드 여부를 입력해 주세요");

        int entrance;
        if (age < 3) {
            entrance = FREE;
        } else if (time >= 17 || age < 13) {
            entrance = CHILD_DISCOUNT;
        } else if (isHonor || isCard) {
            entrance = SPECIAL_DISCOUNT;
        } else {
            entrance = FULL_PRICE;
        }

        System.out.println("입장료: " + NumberFormat.getInstance().format(entrance) + "원");
        scanner.close();
    }

    private static int getValidatedIntInput(Scanner scanner, String message) {
        while (true) {
            try {
                System.out.print(message);
                int input = scanner.nextInt();
                if (input >= 0) return input;
                System.out.println("0 이상의 숫자를 입력해주세요.");
            } catch (Exception e) {
                System.out.println("유효하지 않은 입력입니다. 숫자를 입력해주세요.");
                scanner.nextLine();
            }
        }
    }

    private static boolean getYesOrNoInput(Scanner scanner, String message) {
        scanner.nextLine();
        while (true) {
            System.out.print(message + " (y/n): ");
            String input = scanner.nextLine().trim().toLowerCase();
            if (input.equals("y")) return true;
            if (input.equals("n")) return false;
            System.out.println("유효하지 않은 입력입니다. y 또는 n을 입력해주세요.");
        }
    }
}