设计模式---翻译器模式

1. using System;
2. using System.Collections.Generic;
3. using System.Text;
5. namespace ConsoleApplication1
6. {
7.     abstract class Expretion
8.     {
9.         public void Translate(Words w)
10.         {
11.             string s = w.MyWords.Substring(0, 1);
12.             w.MyWords = w.MyWords.Substring(2);
13.             Excute(s);
14.         }
16.         public abstract void Excute(string s);
17.     }
19.     class EnglishExpretion:Expretion
20.     {
21.         public override void Excute(string s)
22.         {
23.             switch (s)
24.             {
25.                 case "e":
26.                     Console.WriteLine("对方说的英语");
27.                 break;
28.             }
29.         }
30.     }
32.     class GermanExpretion:Expretion
33.     {
34.         public override void Excute(string s)
35.         {
36.             switch (s)
37.             {
38.                 case "g":
39.                     Console.WriteLine("对方说的德语");
40.                     break;
41.             }
42.         }
43.     }
45.     class Words
46.     {
47.         private string words;
49.         public string MyWords
50.         {
51.             get
52.             {
53.                 return words;
54.             }
55.             set
56.             {
57.                 words = value;
58.             }
59.         }
60.     }
62.     class Client
63.     {
64.         public static void Main()
65.         {
66.             Words w = new Words();
67.             w.MyWords = "e g e e g ";
68.             Expretion e=null;
69.             while (w.MyWords.Length>0)
70.             {
71.                 switch (w.MyWords.Substring(0,1))
72.                 {
73.                 case "e":
74.                         e = new EnglishExpretion();
75.                     break;
76.                     case"g":
77.                     e = new GermanExpretion();
78.                     break;
79.                 }
80.                 e.Translate(w);
81.             }
82.             Console.Read();
84.         }
85.     }
86. }