练习题：试使用C#编程实现银行、ATM等功能

练习题：试使用编程实现银行、ATM等功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建账户wangcehnjun
            Account wangchenjun = new Account("wangchenjun", "123456");
            //创建账户niejiong
            Account niejiong = new Account("niejiong", "789456");

            //创建ATM机Transfer1
            ATM Transfer1 =new ATM();
            //用户wangchenjun存入余额100万元
            wangchenjun.toDeposit(1000000);

            Console.WriteLine("wangchenjun用户的余额为: {0}元",wangchenjun.getBalance());
            
            //使用ATM机Transfer1，从用户wangchenjun向用户niejiong转账500元
            if (Transfer1.toTransfer(wangchenjun, niejiong, 500))
                Console.WriteLine("转账已完成！");
            else Console.WriteLine("转账未完成！");

            //用户wangchenjun取出50元现金
            wangchenjun.toTakeOut(50);

            Console.WriteLine("wangchenjun用户的余额为:{0}元",wangchenjun.getBalance());
            Console.WriteLine("niejiong用户的余额为:{0}元", niejiong.getBalance());
          
            Console.ReadKey();

        }
    }
    class Account
    {
        //用户名
        private string userName = "";

        //用户密码
        private string userPassword = "";

        //用户余额（balance）
        private int userBalance = 0;

        //创建账号，构造函数，输入姓名和密码
        public Account(string name, string password)
        {
            userName = name;
            userPassword = password;
        }

        //获取该账户的用户名
        public string getUserName()
        {
            return userName;
        }

        //获取账户余额
        public int getBalance()
        { return userBalance; }

        //存钱
        public bool toDeposit(int numOfDeposit)
        {
            if (numOfDeposit >= 0)          //存储金额为正数
            {
                userBalance = userBalance + numOfDeposit;
                return true;
            }
            else
            {
                return false;
            }        
        }

        //取钱
        public bool toTakeOut(int numOfTakeOut)
        {
            if ((numOfTakeOut >= 0) && (numOfTakeOut <=userBalance)) //要保证取钱数为正数，且要小于余额
            {
                userBalance = userBalance - numOfTakeOut;
                return true;
            }
            else return false;
        }

    }

    class ATM
    {
        //ATM主要用于转账，该类只包含转账这一种方法
        public bool toTransfer(Account account1,Account  account2,int amount)
        {
            bool isTakeOutOK = account1.toTakeOut(amount);
            if (isTakeOutOK)
            {
                Console.Write("账户1({0})转出{1}元成功！",account1.getUserName(), amount);
                bool isDepositOK = account2.toDeposit(amount);
                if (isDepositOK)
                {
                    Console.Write("账户2({0})转入{1}元成功！", account2.getUserName(),amount);
                    return true;                   
                }
                else
                {
                    account1.toDeposit(amount);  //将扣的钱退回到account1
                    Console.Write("转账失败！");
                    return false;
                }
            }
            else
            {
                Console.Write("转账失败！");
                return false;
            }
        }
    }
}

运行结果：