请使用委托实现信用卡用户定时还款功能

学习重点：使用委托实现信用卡用户定时还款功能。委托也是一种引用类型，由委托类型定义委托对象，和函数指针类似。但是委托是面向对象的、类型安全的保险的。为委托分配了方法，委托将与该方法具有完全相同的行为。委托可用于定义回调方法，还能将多种方法关联。在最近的学习中，我学习到了有关委托的用法，但下面的代码还是借鉴了网络。编程能力扔有巨大不足，最近也在补之前的知识，日积月累，最后希望有所进步。

            using System;

//请使用委托实现信用卡用户定时还款功能 namespace LeeCodeText1 { //信用卡对象 class CreditCard { //还款金额 private int money; //还款日 private string repaymentDate; //还款金额的get，set方法 public void setMoney() { Console.Write("请输入本月需还款的金额:"); int money = Convert.ToInt32(Console.ReadLine()); this.money = money; } public int getMOney() { return money; } //还款日的get，set方法 public void setRepaymentDate() { Console.Write("还款日为:"); string repaymentDate = Console.ReadLine(); this.repaymentDate = repaymentDate; } public string getRepayment() { return repaymentDate; } //还款日还款方法 public void repayment(Bank bank, BankCard bankCard) { Console.WriteLine("今天是{0},还款日已到，此次需还款金额为 :{1}元，请还款。", this.repaymentDate, this.money); int balance = bankCard.getBalance(); balance -= this.money; bankCard.setBalance(balance); while (balance < 0) { Console.WriteLine("对不起，当前余额为：{0}，余额不足，请充值！！！", balance); bankCard.setBalance(bank); balance = bankCard.getBalance(); } Console.WriteLine("恭喜您，还款成功，余额还剩：{0}", balance); }

}
//银行卡对象
class BankCard
{
	//银行卡余额
	private int balance;
	//银行卡余额的get，set方法
	public void setBalance(Bank bank)
	{
		int add = bank.add();
		this.balance += add;
	}
	public void setBalance(int banlance)
	{
		this.balance = banlance;

	}
	public int getBalance()
	{
		return balance;
	}
}
//银行对象
class Bank
{
	//充值余额
	public int add()
	{
		Console.Write("请输入充值金额:");
		int addMoney = Convert.ToInt32(Console.ReadLine());
		Console.WriteLine("恭喜您，成功缴纳人民币{0}元，欢迎下次光临！", addMoney);
		return addMoney;
	}
}

class AutomaticPayment
{
	//定义委托
	public delegate void delegateAutomaticPayment(Bank bank, BankCard bancard);
	//定义事件
	public event delegateAutomaticPayment eventAutomaticPayment;

	//调用事件委托
	public void auto(Bank bank, BankCard bankCard)
	{
		if (eventAutomaticPayment != null)
		{
			eventAutomaticPayment(bank, bankCard);
		}

	}
}


class Program
{
	static void Main(string[] args)
	{
		//委托对象
		AutomaticPayment objDelegate = new AutomaticPayment();
		//银行实例对象
		Bank bank = new Bank();
		//银行卡实例对象
		BankCard bankCard = new BankCard();
		//信用卡实例对象
		CreditCard creditCard = new CreditCard();
		//设置银行卡本钱
		//bankCard.setBalance(bank);
		//设置还款金额
		creditCard.setMoney();
		//设置还款日期
		creditCard.setRepaymentDate();
		//订阅事件,还款方法
		objDelegate.eventAutomaticPayment += new AutomaticPayment.delegateAutomaticPayment(creditCard.repayment);
		objDelegate.auto(bank, bankCard);
	}
}

}