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<div align=center class=H1> <font color="#FFFFFF">VB.Net中文教程(13) Whole-Part关系(6)</font> </font> </font></div>
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<p align="left"> <font color="#000000" class="unnamed1">上述程序里，d1、d2及civic
对象之间﹐谁先诞生并无关紧要﹐各独立存在。指令──civic.assignTo(d1) 将d1司机指定给civic 对象﹔另一指令──civic.assignTo(d2)表示﹕改由d2担任civic
之司机。<br>
此Car 类别以参考变量e来指向Engine之对象。现在﹐兹拿上节的Person类别做为例子﹐如果某人(Person
之对象）结婚了﹐就有配偶﹔反之尚未结婚时﹐则无配偶。此时﹐应将Person类别之定义修改如下﹐以表达这种「配偶」关系﹕<br>
<br>
'ex04.bas<br>
Imports System.ComponentModel<br>
Imports System.Drawing<br>
Imports System.WinForms<br>
'----------------------------------------------------<br>
Class Person<br>
Private p_name As String<br>
Private p_age As Integer<br>
Private p_spouse As Person<br>
<br>
Public Sub New(ByVal na As String, ByVal a As Integer)<br>
p_name = na<br>
p_age = a<br>
End Sub<br>
Public Sub spouse(ByVal sp As Person)<br>
p_spouse = sp<br>
sp.p_spouse = Me<br>
End Sub<br>
Public Sub Show()<br>
Messagebox.Show(Me.p_name + ", " + str(Me.p_age)
<br>
+ ", sp: " + Me.p_spouse.p_name)<br>
End Sub<br>
End Class<br>
'----------------------------------------------------<br>
Public Class Form1<br>
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 "</font><br>
...... </span><br>
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