package method.ex;

import java.util.Scanner;

public class MethodEx4Ref {
        public static void main(String[] args) {
            int balance = 0;
            Scanner scanner = new Scanner(System.in);

            while(true) {
                System.out.println("----------------------------------");
                System.out.println("1.입금 | 2. 출금 | 3. 잔액확인 | 4. 종료");
                System.out.println("----------------------------------");
                System.out.print("선택 : ");

                int choice =  scanner.nextInt();
                int amount;

                switch (choice) {
                    case 1:
                        System.out.print("입금액을 입력하세요 : ");
                        amount = scanner.nextInt();
                        balance = deposit(balance, amount);
                        break;
                    case 2:
                        System.out.print("총 금액을 입력하세요 : ");
                        amount = scanner.nextInt();
                        balance = withdraw(balance, amount);
                        break;
                    case 3:
                        System.out.println("현재 잔액 : " + balance + "원");
                        break;
                    case 4:
                        System.out.println("시스템을 종료합니다.");
                        return;
                    default:
                        System.out.println("올바른 선택이 아닙니다. 다시 선택해주세요.");
                        break;
                }
            }

        }
        public static int deposit(int balance, int amount) {
            balance += amount;
            System.out.println(amount + "원을 입금하셨습니다. 현재 잔액 : " + balance + "입니다.");
            return balance;
        }

        public static int withdraw(int balance, int withdrawAmount) {

            if (balance >= withdrawAmount) {
                balance -= withdrawAmount;
                System.out.println(withdrawAmount + "원을 송금하셨습니다.. 현재 잔액: " + balance + "원");
                return balance;
            }

            else {
                System.out.println(withdrawAmount + "원을 송금하려 했으나 잔액이 부족합니다.");
                return balance;
            }

        }
}