subject_39998.htm

一些关于vc的问答

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序号：39998 发表者：小飞狐 发表日期：2003-05-15 08:39:15
<br>主题：救教各位VC高手，类与类成员的值传递！
<br>内容：救教各位VC高手，类与类成员的值传递！<BR><BR>// CLISTVIEW.h : header file<BR><BR>public:<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;int m_allgreen;&nbsp;&nbsp;//在CLISTVIEW类中定义了公有变量<BR>//////////////////////////////////////////////////////////<BR><BR>................<BR><BR>在另一个类listView中获取上面的类的值<BR>// listView.h : header file<BR>#include "CLISTVIEW.h"<BR>.............<BR>void listView::OnChangeEdit2() <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CFormView::OnInitDialog()<BR>&nbsp;&nbsp;&nbsp;&nbsp;UpdateData();<BR>///////////////////////////////////////////////////////<BR>&nbsp;&nbsp;&nbsp;&nbsp;CValueType::m_allgreen;///调用CValueType类中 <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/////成员变量m_allgreen<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_allgreen=m_egreen;//并将控件m_egreen传值给它<BR>//////////////////////////////////////////////////////<BR>&nbsp;&nbsp;&nbsp;&nbsp;UpdateData(0);<BR>}<BR><BR><BR>链接时：<BR>&nbsp;&nbsp;&nbsp;&nbsp; error C2597: illegal reference to data member 'CValueType::m_allgreen' in a static member function<BR>&nbsp;&nbsp;&nbsp;&nbsp; error C2065: 'm_allgreen' : undeclared identifier<BR>Error executing cl.exe.<BR><BR>&nbsp;&nbsp; 还请各位VC高手帮我分析一下，我应该怎么实现类与类间成员的通信？<BR><BR>小弟在此不胜感激，谢谢：）<BR>
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<font color=red>答案被接受</font><br>回复者：Neil Gan 回复日期：2003-05-15 08:48:40
<br>内容：For every instance of CValueType, there is a copy of m_allgreen. You must tell the compiler which copy do you need:<BR><BR>CValueType AnyVar;<BR>AnyVar.m_allgreen=3;<BR><BR>BTW, it is a really bad programming style using public member variables.
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回复者：ohye212 回复日期：2003-05-15 09:08:24
<br>内容：你要在listView中调用 CLISTVIEW的m_allgreen成员<BR>你必须用CLISTVIEW类的实体<BR>CLISTVIEW www;<BR>www.allgreen;//这样才可以<BR>
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