状态模式作业

任务的要求如下：

下面是设计的UML类图：

下面是部分代码片段：

 1 /// <summary>
 2     /// 环境类
 3     /// </summary>
 4     public class Account
 5     {
 6         public AccountState State { set; get; }
 7         public string Owner { set; get; }
 8         public double Balance { set; get; }
 9
10         public Account(string owner, double initialAmount)
11         {
12             Owner = owner;
13             Balance = initialAmount;
14             State = new VistorState(this);  //设置初始状态
15         }
16
17         public void SetBalance(double amount)
18         {
19             Balance = amount;
20
21         }
22
23         //存款
24         public void Deposit(double amount)
25         {
26             Console.WriteLine("存入" + amount);
27             State.Deposit(amount);
28             Console.WriteLine("用户状态变为" + State._Statename);
29         }
30
31         //消费
32         public void Shopping(double amount)
33         {
34             Console.WriteLine("消费" + amount);
35             State.Shopping(amount);
36             Console.WriteLine("用户状态变为" + State._Statename);
37         }
38
39
40     }

 1  /// <summary>
 2     /// 抽象状态类
 3     /// </summary>
 4     public abstract class AccountState
 5     {
 6         protected Account _account;
 7         public string _Statename;
 8
 9         public abstract void Deposit(double amount);
10         public abstract void Shopping(double amount);
11         public abstract void StateCheck();
12     }

 1  /// <summary>
 2     /// 访客状态类
 3     /// </summary>
 4     public class VistorState:AccountState
 5     {
 6         public VistorState(Account account)
 7         {
 8             _account = account;
 9             _Statename = "访客账户";
10             StateCheck();  //默认的检查
11         }
12
13         //取款
14         public override void Deposit(double amount)
15         {
16             _account.Balance += amount;
17             Console.WriteLine(_account.Owner + " 向账户中存款" + amount + "元，存款后的账户余额为：" + _account.Balance);
18             StateCheck();
19         }
20
21         //消费
22         public override void Shopping(double amount)
23         {
24             double newBalance = _account.Balance - amount;
25             if (newBalance > 0)
26             {
27                 _account.Balance -= amount;
28                 Console.WriteLine(_account.Owner + "在《访客服务》中消费" + amount + "元，账户余额：" + _account.Balance);
29             }
30             else
31             {
32                 Console.WriteLine("您的账户余额不足，请充值。");
33             }
34             StateCheck();
35         }
36
37         //检查用户状态
38         public override void StateCheck()
39         {
40             if (_account.Balance > 100 && _account.Balance < 1000)
41             {
42                 //会员用户状态
43                 _account.State = new MemberState(_account);
44             }
45             else if (_account.Balance > 1000)
46             {
47                 //贵宾用户状态
48                 _account.State = new VIPState(_account);
49             }
50         }
51     }

 1  /// <summary>
 2     /// 会员状态类
 3     /// </summary>
 4     public class MemberState:AccountState
 5     {
 6         public MemberState(Account account)
 7         {
 8             _account = account;
 9             _Statename = "会员账户";
10         }
11
12         //取款
13         public override void Deposit(double amount)
14         {
15             _account.Balance += amount;
16             Console.WriteLine(_account.Owner + " 向账户中存款" + amount + "元，存款后的账户余额为：" + _account.Balance);
17             StateCheck();
18         }
19
20         //消费
21         public override void Shopping(double amount)
22         {
23             double newBalance = _account.Balance - amount;
24             if (newBalance > 0)
25             {
26                 _account.Balance -= amount;
27                 Console.WriteLine(_account.Owner + "在《会员服务》中消费" + amount + "元，账户余额：" + _account.Balance);
28             }
29             else
30             {
31                 Console.WriteLine("您的账户余额不足，请充值。");
32             }
33             StateCheck();
34         }
35
36         //检查用户状态
37         public override void StateCheck()
38         {
39             if (_account.Balance > 0 && _account.Balance < 100)
40             {
41                 //访客用户状态
42                 _account.State = new VistorState(_account);
43             }
44             else if (_account.Balance > 1000)
45             {
46                 //贵宾用户状态
47                 _account.State = new VIPState(_account);
48
49             }
50         }
51     }

 1 /// <summary>
 2     /// 贵宾状态类
 3     /// </summary>
 4     public class VIPState:AccountState
 5     {
 6         public VIPState(Account account)
 7         {
 8             _account = account;
 9             _Statename = "贵宾账户";
10         }
11
12         //取款
13         public override void Deposit(double amount)
14         {
15             _account.Balance += amount;
16             Console.WriteLine(_account.Owner + " 向账户中存款" + amount + "元，存款后的账户余额为：" + _account.Balance);
17             StateCheck();
18         }
19
20         //消费
21         public override void Shopping(double amount)
22         {
23             double newBalance = _account.Balance - amount;
24             if (newBalance > 0)
25             {
26                 _account.Balance -= amount;
27                 Console.WriteLine(_account.Owner + "在《贵宾服务》中消费" + amount + "元，账户余额：" + _account.Balance);
28             }
29             else
30             {
31                 Console.WriteLine("您的账户余额不足，请充值。");
32             }
33             StateCheck();
34         }
35
36         //检查用户状态
37         public override void StateCheck()
38         {
39             if (_account.Balance > 0 && _account.Balance < 100)
40             {
41                 //访客用户状态
42                 _account.State = new VistorState(_account);
43             }
44             else if (_account.Balance > 100&&_account.Balance<1000)
45             {
46                 //会员用户状态
47                 _account.State = new MemberState(_account);
48             }
49         }
50     }

/// <summary>
    /// 客户端代码
    /// </summary>
    class Program
    {
        static void Main(string[] args)
        {
            Account account = new Account("王大锤", 99);
            Console.WriteLine("开户成功。姓名：" + account.Owner + " 初始金额：" + account.Balance + " 账户类型：" + account.State._Statename);
            Console.WriteLine("----------------------------");

            account.Deposit(20);
            Console.WriteLine("-----------------------------");

            account.Shopping(30);
            Console.WriteLine("-----------------------------");

            account.Deposit(9999);
            Console.WriteLine("------------------------------");

            Console.ReadLine();
        }
    }

下面是程序的结果：