银行账户类 累

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

namespace BankSystem
{
// 为银行开发应用系统。银行账户Account，包含信息有账号、户主姓名、余额Balance，对账户的操作有取款，存款，查询余额。
//账户又分为储蓄账户SavingAccount和信用卡账户CreditAccount。
//储蓄账户有利息，利率是3.5% ，取款时不能透支。
//信用卡账户没有利息，有透支额度。
//账户可以订制余额变动通知服务，在余额变化后，用短信或邮件通知用户。
//按以上信息
//1 设计类BankAccount，完成构造取款存款查询等方法。(20’)
//2 使用继承，完成SavingAccount，CreditAccount类（30‘）
//3 将(1)完成的代码注释，将BankAccount 类改为抽象类，取款，存款方法改为抽象方法。(20’)
//4 定义余额变动事件，在余额改变时触发。(20)
//5 在Program类的Main方法里，应用你定义的类。如：
//    创建一个储蓄账户
//    创建一个信用卡账户
//    存取款
//    查余额
//    为账户余额变动事件写处理方法，在控制台输入提示信息。

    //class BankAccount
    //{
    //    private string accountNO;//账号
    //    public string AccountNO
    //    {
    //        get { return accountNO; }    
    //    }
    //    private string name;//户主姓名
    //    public string Name
    //    {
    //        get { return name; }           
    //    }
    //    protected decimal balance;//余额Balance
    //    public decimal Balance
    //    {
    //        get { return balance; }          
    //    }
    //    public BankAccount(string accountNO,string name,decimal balance)
    //    {
    //        this.accountNO = accountNO;
    //        this.name = name;
    //        this.balance = balance;
    //    }

    //    public void Deposit(decimal money)  //存款
    //    {
    //        balance += money;

    //    }
    //    public virtual  void Teller(decimal money)  //取款
    //    {
    //        if (balance >= money)
    //        {
    //            balance -= money;
    //        }
    //    }

    //    public void DispInfo()
    //    {
    //        Console.WriteLine("{0}    {1}     {2}", AccountNO, Name, Balance);
    //    }
    //}

    delegate void MyDelegate(BankAccount ba ,decimal change);

    abstract class BankAccount
    {
        public event MyDelegate handleBalanceChange;   
        private string accountNO;//账号
        public string AccountNO
        {
            get { return accountNO; }
        }
        private string name;//户主姓名
        public string Name
        {
            get { return name; }
        }
        protected decimal balance;//余额Balance
        protected decimal Balance
        {
            get { return balance; }
            set
            {
                decimal change = value - balance;
                balance = value; 
                if (handleBalanceChange != null)
                {
                    handleBalanceChange(this, change);
                }
            }
        }
        public BankAccount(string accountNO, string name, decimal balance)
        {
            this.accountNO = accountNO;
            this.name = name;
            this.balance = balance;
        }

        public abstract void Deposit(decimal money);
        public abstract void Teller(decimal money);

        public virtual void DispInfo()
        {
            Console.WriteLine("{0}    {1}     {2}", AccountNO, Name, Balance);
        }
    }
    class SavingAccount : BankAccount
    {
      
        public SavingAccount(string accountNO, string name, decimal balance)
            : base(accountNO, name, balance)
        { 
        }
        float interestRate = 0.035f;

        public float InterestRate
        {
            get { return interestRate; }
            set { interestRate = value; }
        }

        public override void Deposit(decimal money)  //存款
        {
            Balance += money;
          
        }
        public override void Teller(decimal money)  //取款
        {
            if (Balance >= money)
            {
                Balance -= money;
            }
        }

        public override void DispInfo()
        {
            Console.WriteLine("{0}    {1}     {2}   interestRate:{3} ", AccountNO, Name, Balance, interestRate);
        }
                
    }
    class CreditAccount : BankAccount
    {
        public CreditAccount(string accountNO, string name, decimal balance)
            : base(accountNO, name, balance)
        { 
        }
        decimal overdraftFacility=10000;

        public decimal OverdraftFacility
        {
          get { return overdraftFacility; }
          set { overdraftFacility = value; }
        }

        public override void Deposit(decimal money)  //存款
        {
            Balance += money;
        }

        public override void Teller(decimal money)  //取款
        {
            if ((Balance + overdraftFacility) >= money)
            {
                Balance -= money;
            }
        }

        public override void DispInfo()
        {
            Console.WriteLine("{0}    {1}     {2}   overdraftFacility:{3} ", AccountNO, Name, Balance, overdraftFacility);
        }
    }
    

    class Program
    {
        static void Main(string[] args)
        {
            SavingAccount sa = new SavingAccount("s001","zhanghua",54020);
            CreditAccount ca = new CreditAccount("c001", "wangfang", 45564);
            sa.handleBalanceChange += new MyDelegate(sa_handleBalanceChange);
            ca.handleBalanceChange += new MyDelegate(sa_handleBalanceChange);
            sa.Teller(5000);           
            sa.Deposit(8000);
          
            ca.Teller(3000);
            ca.Deposit(8000);
           
        }

        static void sa_handleBalanceChange(BankAccount ba ,decimal change)
        {
            Console.WriteLine("你账户增加了{0}元",change);
            Console.WriteLine("你更新后的账户信息");
            ba.DispInfo();
        }
    }
}