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<div align=center class=H1> <font color="#FFFFFF">VB.Net中文教程(13) Whole-Part关系(2)</font> </font> </font></div>
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<p align="left"> <font color="#000000">Inherits System.WinForms.Form<br>
<br>
Public Sub New()<br>
MyBase.New()<br>
<br>
Form1 = Me<br>
'This call is required by the Win Form Designer.<br>
InitializeComponent()<br>
'TODO: Add any initialization after the InitializeComponent()
call<br>
End Sub<br>
'Form overrides dispose to clean up the component list.<br>
Public Overrides Sub Dispose()<br>
MyBase.Dispose()<br>
components.Dispose()<br>
End Sub<br>
#Region " Windows Form Designer generated code "<br>
......<br>
#End Region<br>
Protected Sub Form1_Click(ByVal sender As Object, ByVal e As
System.EventArgs)<br>
Dim x(2) As Club<br>
x(0) = New Club("sogo")<br>
x(1) = New Club("gold")<br>
Dim a As New Person("Alvin", 32)<br>
Dim b As New Person("Judy", 28)<br>
Dim c As New Person("Bob", 38)<br>
x(0).join(a)<br>
x(0).join(b)<br>
x(1).join(b)<br>
x(1).join(c)<br>
x(0).display()<br>
x(1).display()<br>
End Sub<br>
End Class<br>
<br>
此程序输出：<br>
<br>
Club: sogo has member:<br>
Alvin, 32<br>
Judy, 28<br>
Club: gold has member:<br>
Judy, 28<br>
Bob, 38<br>
<br>
组合对象x 含"sogo"及"gold"两俱乐部﹐其中"gold"俱乐部拥有两个会员──"Alvin" 及"Judy"﹐而"sogo"俱乐部拥有两位会员──"Judy"及"Bob"
。x(0)代表"sogo"俱乐部﹐s(1)代表"gold"俱乐部﹐所以指令── s(0).join( a ) 表示a 加入"gold"俱乐部﹐成为其会员。
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