c#work2

用委托和事件实现信用卡还款功能：
信用卡和存储卡保存着用的金额，通过还款类判断今日是否需要还款，以及是否可以还款成功，最后完成还款这个事件。

定义信用卡类、存储卡类、还款类`

{private string name;private int depositMoney;public depositCard(string name, int money){this.name = name;this.depositMoney = money;}public int getDepositMoney(){return this.depositMoney;}public void setDepositMoney(int r){this.depositMoney = r;}
}
//信用卡类
class creditCard
{public string name；public int creditMoney;public int dueDay;public depositCard DC;public creditCard(string name, int CM, int DD, depositCard DC){this.name = name;this.creditMoney = CM;this.dueDay = DD;this.DC = DC;}//还款public void repayM(){Console.WriteLine("用户{0}当前金额{1}", this.name, this.DC.getDepositMoney());DC.setDepositMoney(this.DC.getDepositMoney() + creditMoney);Console.WriteLine("用户已还款");Console.WriteLine("还款金额:{0}", Math.Abs(this.creditMoney));Console.WriteLine("余下金额为{0}", DC.getDepositMoney());Console.WriteLine();}//无需还款public void norepayM(){Console.WriteLine("用户{0}当前金额{1}", this.name, this.DC.getDepositMoney());Console.WriteLine("用户未到还款日期，无需还款", this.name);Console.WriteLine();}
}`

主函数

depositCard D1 = new depositCard("张三", 10000);depositCard D2 = new depositCard("李四", 10000);depositCard D3 = new depositCard("王五", 10000);creditCard C1 = new creditCard("张三", -8000, 31, D1);creditCard C2 = new creditCard("李四", -3000, 7, D2);creditCard C3 = new creditCard("王五", -7000, 7, D3);List<creditCard> cCards = new List<creditCard>();cCards.Add(C1);cCards.Add(C2);cCards.Add(C3);//创建委托对象repayDelegate rD = new repayDelegate();foreach (creditCard C in cCards){//判断是否到了该还款的日期if (C.dueDay == int.Parse(DateTime.Now.ToString("yyyy-MM-dd").Split('-')[2])){rD.DoRepay += new repayDelegate.repayMoney(C.repayM);}else{rD.DoRepay += new repayDelegate.repayMoney(C.norepayM);}}rD.NotifyRepay();

运行结果

gitee：https://gitee.com/jiang-zhongwen/jiang-zhongwen

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