C#面向对象

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2013年10月11日 ⁄ 综合 ⁄ 共 8636字 ⁄ 字号小中大 ⁄ 评论关闭

1、写一个账户类(Account)，属性：

Id：账户号码

Password：账户密码

Name：真实姓名

PersonId：身份证号码

Email：客户的电子邮箱

Balance：账户余额

方法:

Deposit：存款方法,参数是double型的金额

Withdraw：取款方法,参数是double型的金额

构造方法:

有参和无参,有参构造方法用于设置必要的属性

2、银行的客户分为两类,储蓄账户(SavingAccount)和信用账户(CreditAccount),区别在于储蓄账户不允许透支,而信用账户可以透支,并允许用户设置自己的透支额度(使用ceiling表示).

为这两种用户编写相关的类

3、编写Bank类，属性:

（1）当前所有的账户对象的集合

（2）当前账户数量

方法:

（1）用户开户：

需要的参数:id、密码、姓名、身份证号码、邮箱、账户类型（储蓄账户还是信用账户）；

（2）用户登录：

参数：id、密码；返回Account对象

（3）用户存款：

参数：id、存款数额

（4）用户取款：参数：id、取款数额

（5）设置透支额度：参数:id、新的额度；这个方法需要验证账户是否是信用账户

用户会通过调用Bank对象以上的方法来操作自己的账户,请分析各个方法需要的参数

另外,请为Bank类添加几个统计方法

（6）统计银行所有账户余额总数

（7）统计所有信用账户透支额度总数

4、写个主方法测试你写的类

Account.cs

using System;<br /> using System.Collections.Generic;<br /> using System.Text;</p> <p>namespace EXE1<br /> {<br /> abstract class Account<br /> {<br /> //账户号码<br /> protected long id;</p> <p> public long ID<br /> {<br /> get { return id; }<br /> set { id = value; }<br /> }</p> <p> //账户密码<br /> protected string password;</p> <p> public string Password<br /> {<br /> get { return password; }<br /> set { password = value; }<br /> }</p> <p> //户主姓名<br /> protected string name;</p> <p> public string Name<br /> {<br /> get { return name; }<br /> set { name = value; }<br /> }</p> <p> //身份证号码<br /> protected string personId;</p> <p> public string PersonId<br /> {<br /> get { return personId; }<br /> set { personId = value; }<br /> }</p> <p> //email<br /> protected string email;</p> <p> public string Email<br /> {<br /> get { return email; }<br /> set { email = value; }<br /> }</p> <p> protected double balance;</p> <p> public double Balance<br /> {<br /> get { return balance; }<br /> set { balance = value; }<br /> }</p> <p> //静态的id号码生成器<br /> private static long idBuilder = 100000;</p> <p> public static long IdBuilder<br /> {<br /> get { return idBuilder; }<br /> set { idBuilder = value; }<br /> }</p> <p> /// <summary><br /> /// 存款<br /> /// </summary><br /> /// <param name="sum"></param><br /> public void Deposit(double sum)<br /> {<br /> if(sum<0)<br /> {<br /> throw new InvalidOperationException("输入的金额为负数！");<br /> }<br /> balance += sum;<br /> }</p> <p> /// <summary><br /> /// 抽象函数：取款，需要在子类中重写此方法<br /> /// </summary><br /> /// <param name="sum"></param><br /> public abstract void Withdraw(double sum);</p> <p> public Account()<br /> {</p> <p> }</p> <p> /// <summary><br /> /// 有参数构造函数<br /> /// </summary><br /> public Account(string password,string name,string personId,string email)<br /> {<br /> this.id = ++idBuilder;<br /> this.password = password;<br /> this.name = name;<br /> this.personId = personId;<br /> this.email = email;<br /> }</p> <p> }<br /> }<br />

CreditAccount.cs

using System;<br /> using System.Collections.Generic;<br /> using System.Text;</p> <p>namespace EXE1<br /> {<br /> class CreditAccount : Account<br /> {<br /> protected double ceiling;</p> <p> public double Ceiling<br /> {<br /> get { return ceiling; }<br /> set { ceiling = value; }<br /> }</p> <p> public CreditAccount(string password, string name, string personId, string email)<br /> : base(password, name, personId, email)<br /> {<br /> }</p> <p> /// <summary><br /> /// 信用账户的取款操作<br /> /// </summary><br /> public override void Withdraw(double sum)<br /> {<br /> if (sum < 0)<br /> {<br /> throw new InvalidOperationException("输入的金额为负数！");<br /> }<br /> if (sum > balance+ceiling)<br /> {<br /> throw new InvalidOperationException("金额已经超出余额和透支度的总数！");<br /> }<br /> balance -= sum;<br /> }</p> <p> }<br /> }<br />

SavingAccount.cs

using System;<br /> using System.Collections.Generic;<br /> using System.Text;</p> <p>namespace EXE1<br /> {<br /> class SavingAccount:Account<br /> {<br /> public SavingAccount(string password, string name, string personId, string email)<br /> :base(password,name,personId,email)<br /> {</p> <p> }</p> <p> /// <summary><br /> /// Withdraw from saving account.<br /> /// </summary><br /> /// <param name="sum"></param><br /> public override void Withdraw(double sum)<br /> {<br /> if (sum < 0)<br /> {<br /> throw new InvalidOperationException("输入的金额为负数！");<br /> }<br /> if (sum > balance)<br /> {<br /> throw new InvalidOperationException("金额已经超出余额！");<br /> }<br /> balance -= sum;<br /> }</p> <p> }<br /> }<br />

Bank.cs

using System;<br /> using System.Collections.Generic;<br /> using System.Text;</p> <p>namespace EXE1<br /> {<br /> /// <summary><br /> /// Bank类，对当前银行中的所有账户进行管理<br /> /// </summary><br /> class Bank<br /> {<br /> //存放账户的集合<br /> private List<Account> accounts;</p> <p> public List<Account> Accounts<br /> {<br /> get { return accounts; }<br /> set { accounts = value; }<br /> }</p> <p> //当前银行的账户数量<br /> private uint currentAccountNumber;</p> <p> public uint CurrentAccountNumber<br /> {<br /> get { return currentAccountNumber; }<br /> set { currentAccountNumber = value; }<br /> }</p> <p> /// <summary><br /> /// 构造函数.<br /> /// </summary><br /> public Bank()<br /> {<br /> accounts=new List<Account>();</p> <p> }</p> <p> /// <summary><br /> /// 开户；<br /> /// typeOfAccount：1 for saving account, 2 for credit account, 3 for loan saving account, 4 for loan credit account..<br /> /// </summary></p> <p> public Account OpenAccount(string password, string confirmationPassword, string name, string personId, string email, int typeOfAccount)<br /> {<br /> Account newAccount;<br /> if (!password.Equals(confirmationPassword))<br /> {<br /> throw new InvalidOperationException("两次密码输入的不一致！");<br /> }</p> <p> switch (typeOfAccount)<br /> {<br /> case 1: newAccount=new SavingAccount(password, name, personId, email); break;<br /> case 2: newAccount=new CreditAccount(password, name, personId, email); break;<br /> default: throw new ArgumentOutOfRangeException("账户类型是1到2之间的整数");<br /> }<br /> //把新开的账户加到集合中<br /> accounts.Add(newAccount);</p> <p> return newAccount;<br /> }</p> <p> /// <summary><br /> /// 根据账户id得到账户对象<br /> /// </summary><br /> /// <param name="id"></param><br /> /// <returns></returns><br /> private Account GetAccountByID(long id)<br /> {<br /> foreach (Account account in accounts)<br /> {<br /> if (account.ID == id)<br /> {<br /> return account;<br /> }<br /> }<br /> return null;<br /> }</p> <p> /// <summary><br /> /// 根据账号和密码登陆账户<br /> /// </summary><br /> public Account SignIn(long id, string password)<br /> {<br /> foreach (Account account in accounts)<br /> {<br /> if (account.ID == id && account.Password.Equals(password))<br /> {<br /> return account;<br /> }</p> <p> }<br /> throw new InvalidOperationException("用户名或者密码不正确，请重试！");<br /> return null;<br /> }</p> <p> /// <summary><br /> /// 存款<br /> /// </summary><br /> public Account Deposit(long id, double sum)<br /> {<br /> Account account = GetAccountByID(id);<br /> if (account != null)<br /> {<br /> account.Deposit(sum);<br /> return account;<br /> }<br /> throw new InvalidOperationException("非法账号！");<br /> return null;<br /> }</p> <p> /// <summary><br /> /// 取款<br /> /// </summary><br /> public Account Withdraw(long id, double sum)<br /> {<br /> Account account = GetAccountByID(id);<br /> if (account != null)<br /> {<br /> account.Withdraw(sum);<br /> return account;<br /> }<br /> throw new InvalidOperationException("非法账号！");<br /> return null;<br /> }</p> <p> /// <summary><br /> /// 设置透支额度<br /> /// </summary><br /> public Account SetCeiling(long id, double newCeiling)<br /> {<br /> Account account = GetAccountByID(id);<br /> try<br /> {<br /> (account as CreditAccount).Ceiling = newCeiling;<br /> return account;<br /> }<br /> catch (Exception ex)<br /> {<br /> throw new InvalidOperationException("此账户不是信用账户！");<br /> return account;<br /> }<br /> throw new InvalidOperationException("非法账号！");<br /> return null;<br /> }</p> <p> /// <summary><br /> /// 统计银行所有账户余额总数<br /> /// </summary><br /> /// <returns></returns><br /> public double GetTotalBalance()<br /> {<br /> double totalBalance = 0;<br /> foreach (Account account in accounts)<br /> {<br /> totalBalance += account.Balance;<br /> }<br /> return totalBalance;<br /> }</p> <p> /// <summary><br /> /// 统计所有信用账户透支额度总数<br /> /// </summary><br /> public double GetTotalCeiling()<br /> {<br /> double totalCeiling = 0;<br /> foreach (Account account in accounts)<br /> {<br /> if (account is CreditAccount)<br /> {<br /> totalCeiling += (account as CreditAccount).Ceiling;<br /> }<br /> }<br /> return totalCeiling;<br /> }<br /> }<br /> }<br />

客户端测试:

using System;<br /> using System.Collections.Generic;<br /> using System.Text;</p> <p>namespace EXE1<br /> {<br /> class Program<br /> {<br /> /// <summary><br /> /// Sign when needed.<br /> /// </summary><br /> /// <returns></returns><br /> static Account SignIn(Bank icbc)<br /> {<br /> Console.WriteLine("/nPlease input your account ID:");<br /> long id;<br /> try<br /> {<br /> id = long.Parse(Console.ReadLine());<br /> }<br /> catch (FormatException)<br /> {<br /> Console.WriteLine("Invalid account ID!");<br /> return null;<br /> }<br /> Console.WriteLine("Please input your password:");<br /> string password = Console.ReadLine();<br /> Account account;<br /> try<br /> {<br /> account = icbc.SignIn(id, password);<br /> }<br /> catch (InvalidOperationException ex)<br /> {<br /> Console.WriteLine(ex.Message);<br /> return null;<br /> }<br /> return account;<br /> }</p> <p> /// <summary><br /> /// Simulate an ATM<br /> /// </summary><br /> /// <param name="args"></param><br /> static void Main(string[] args)<br /> {<br /> Bank icbc = new Bank();</p> <p> while (true)<br /> {<br /> Console.WriteLine("/nPlease choose the service you need:");<br /> Console.WriteLine("(1) Open a New Account");<br /> Console.WriteLine("(2) Deposit");<br /> Console.WriteLine("(3) Withdraw");<br /> Console.WriteLine("(4) Set Ceiling");<br /> Console.WriteLine("(5) Get Total Balance");<br /> Console.WriteLine("(6) Get Total Ceiling");<br /> Console.WriteLine("(0) Exit");<br /> string choice;</p> <p> choice = Console.ReadKey().KeyChar.ToString();</p> <p> switch (choice)<br /> {<br /> case "1":<br /> {<br /> string personId;<br /> int typeOfAccount;<br /> string password;<br /> Console.WriteLine("/nWhich kind of account do you want to open?");<br /> while (true)<br /> {<br /> Console.WriteLine("(1) Saving Account/n(2) Credit Account/n(3) Return to Last Menu");<br /> try<br /> {<br /> typeOfAccount = int.Parse(Console.ReadKey().KeyChar.ToString());<br /> }<br /> catch (FormatException)<br /> {<br /> Console.WriteLine("/nInvalid option, please choose again!");<br /> continue;<br /> }<br /> if (typeOfAccount < 1 || typeOfAccount > 5)<br /> {<br /> Console.WriteLine("/nInvalid option, please choose again!");<br /> continue;<br /> }<br /> break;<br /> }<br /> if (typeOfAccount == 5)<br /> {<br /> break;<br /> }<br /> Console.WriteLine("/nPlese input your name:");<br /> string name = Console.ReadLine();<br /> while (true)<br /> {<br /> Console.WriteLine("Please input your Personal ID:");<br /> personId = Console.ReadLine();<br /> if (personId.Length != 18)<br /> {<br /> Console.WriteLine("Invalid Personal ID, please input again!");<br /> continue;<br /> }<br /> break;<br /> }<br /> Console.WriteLine("Please input your E-mail:");<br /> string email = Console.ReadLine();<br /> while (true)<br /> {<br /> Console.WriteLine("Please input your password:");<br /> password = Console.ReadLine();<br /> Console.WriteLine("Please confirm your password:");<br /> if (password != Console.ReadLine())<br /> {<br /> Console.WriteLine("The password doesn't math!");<br /> continue;<br /> }<br /> break;<br /> }</p> <p> Account account = icbc.OpenAccount(password, password, name, personId, email, typeOfAccount);<br /> Console.WriteLine("The account opened successfully.");<br /> Console.WriteLine("Account ID: {0}/nAccount Name: {1}/nPerson ID: {2}/nE-mail: {3}/nBalance: {4}", account.ID, account.Name, account.PersonId, account.Email, account.Balance);<br /> break;<br /> }<br /> case "2":<br /> {<br /> Account account = SignIn(icbc);<br /> if (account == null)<br /> {<br /> break;<br /> }<br /> int amount;<br /> while (true)<br /> {<br /> Console.WriteLine("Please input the amount:");<br /> try<br /> {<br /> amount = int.Parse(Console.ReadLine());<br /> }<br /> catch (FormatException)<br /> {<br /> Console.WriteLine("Invalid input!");<br /> continue;<br /> }<br /> break;<br /> }<br /> try<br /> {<br /> icbc.Deposit(account.ID, amount);<br /> }<br /> catch (InvalidOperationException ex)<br /> {<br /> Console.WriteLine(ex.Message);<br /> break;<br /> }<br /> Console.WriteLine("Deposit successfully, your balance is {0} yuan.", account.Balance);<br /> break;<br /> }<br /> case "3":<br /> {<br /> Account account = SignIn(icbc);<br /> if (account == null)<br /> {<br /> break;<br /> }<br /> int amount;<br /> while (true)<br /> {<br /> Console.WriteLine("Please input the amount:");<br /> try<br /> {<br /> amount = int.Parse(Console.ReadLine());<br /> }<br /> catch (FormatException)</p> <div style="font-size:0px;height:0px;line-height:0px;margin:0;padding:0;clear:both"></div>   <script type="text/javascript" src="//cpro.baidustatic.com/cpro/ui/cno.js" async="async" defer="defer" ></script> </div> </div> <div class="back_b"> <a href="javascript:void(0);" onclick="history.back();">返回</a> </div> <div class="clear"></div>  <i class="lt"></i> <i class="rt"></i> </div> <div class="entry_sb"> <i class="lb"></i> <i class="rb"></i> </div> <div 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