TicketMachine

import java.util.Scanner;

public class TicketMachine {
    private int price;
    private int balance;
    private int total;

    public TicketMachine(){
        price = 2;
        balance = 0;
        total = 0;
    }
    public int getPrice(){
        return price;
    }
    public int getBalance(){
        return balance;
    }
    public int getTotal(){
        return total;
    }
    public void insertMoney(int amount){
        if (amount > 0){
            balance += amount;
            System.out.println("当前余额：" + balance);
        }
        else {
            System.out.println("输入金额错误："+ amount);
        }
    }
    public void printTicket(){
        if (balance >= price){
            System.out.println("===================");
            System.out.println("This is a ticket");
            System.out.println("price : 2 yuan");
            System.out.println("===================");
            balance -= price;
            System.out.println("当前余额：" + balance + " 元");
        }
    }
    public int refundBalance(){
        int amountToRefund;
        amountToRefund = balance;
        balance = 0;
        System.out.println("请收好找零 " + amountToRefund +" 元");
        return amountToRefund;
    }

    public static void main(String[] args){
        boolean a = true;
        Scanner scan = new Scanner(System.in);
        int choice;
        TicketMachine T1 = new TicketMachine();

        while (a){
            System.out.println("===============欢迎使用自动售票机==============");
            System.out.println("本机销售固定票价2元的车票");
            while (a){
                System.out.println("请选择服务...");
                System.out.println("1、投币");
                System.out.println("2、打印车票");
                System.out.println("3、找零");
                choice = scan.nextInt();
                if (choice == 1){
                    int money = scan.nextInt();
                    T1.insertMoney(money);

                }
                else if (choice == 2){
                    T1.printTicket();
                }
                else if (choice == 3){
                    T1.refundBalance();
                    break;
                }

            }

        }

    }
}