C#-単純ファクトリモード

コード:

 1 using System;

 2 using System.Collections.Generic;

 3 using System.Linq;

 4 using System.Text;

 5 using System.Threading.Tasks;

 6 

 7 namespace  

 8 {

 9     class Program

10     {

11         static void Main(string[] args)

12         {

13             Console.Write(" ：");

14             string brand = Console.ReadLine();

15             Notepad nt = GC(brand);

16             nt.SayHello();

17             Console.ReadKey();

18         }

19 

20 

21         /// <summary>

22         ///  

23         /// </summary>

24         /// <param name="brand"></param>

25         /// <returns></returns>

26         public static Notepad GC(string brand)

27         {

28             Notepad nt = null;

29 

30             switch (brand)

31             {

32                 // 

33                 case "Lenovo": nt = new Lenovo(); break;

34                 case "Acer": nt = new Acer(); break;

35                 case "IBM": nt = new IBM(); break;

36                 default:break;

37             }

38 

39             return nt;

40         }

41     }

42 

43     /// <summary>

44     ///  

45     /// </summary>

46     public abstract class Notepad

47     {

48         public abstract void SayHello();

49     }

50 

51     /// <summary>

52     ///  

53     /// </summary>

54     public class Acer : Notepad

55     {

56         public override void SayHello()

57         {

58             Console.WriteLine(" ！");

59         }

60     }

61 

62     /// <summary>

63     ///  

64     /// </summary>

65     public class Lenovo : Notepad

66     {

67         public override void SayHello()

68         {

69             Console.WriteLine(" ！");

70         }

71     }

72 

73     /// <summary>

74     /// IBM

75     /// </summary>

76     public class IBM : Notepad 

77     {

78         public override void SayHello()

79         {

80             Console.WriteLine(" IBM！");

81         }

82     }

83 }