subject_60850.htm

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序号：60850 发表者：门前池塘里的鱼 发表日期：2003-11-15 22:34:42
<br>主题：怎么在集合类CTypedPtrList中删除其中的某些对象
<br>内容：POSITION m_TreeListPosition = m_TreeList-&gt;GetHeadPosition();<BR>//m_TreeList为CTypedPtrList&lt;TreeTypeList, Tree*&gt; TreeList;<BR>do<BR>{<BR>&nbsp;&nbsp;Tree * Temp_Tree = m_TreeList-&gt;GetAt(m_TreeListPosition);<BR>//<BR>&nbsp;&nbsp;m_TreeList-&gt;GetNext(m_TreeListPosition);<BR>&nbsp;&nbsp;if(Temp_Tree-&gt;State == false)<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_TreeList-&gt;RemoveAt(m_TreeListPosition);<BR>&nbsp;&nbsp;&nbsp;&nbsp;delete Temp_Tree;<BR>&nbsp;&nbsp; }<BR>}<BR>while((m_TreeListPosition == 0) );<BR>帮俺看看吧，谢谢啦！
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回复者：红苹果 回复日期：2003-11-16 00:58:26
<br>内容：如下44：<BR>POSITION pos,m_TreeListPosition = m_TreeList-&gt;GetHeadPosition();<BR>//m_TreeList为CTypedPtrList&lt;TreeTypeList, Tree*&gt; TreeList;<BR>while( pos = m_TreeListPosition )<BR>{<BR>&nbsp;&nbsp;Tree * Temp_Tree = m_TreeList-&gt;GetNext(m_TreeListPosition);<BR>&nbsp;&nbsp;if(Temp_Tree-&gt;State == false)<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_TreeList-&gt;RemoveAt(pos);<BR>&nbsp;&nbsp;&nbsp;&nbsp;delete Temp_Tree;<BR>&nbsp;&nbsp; }<BR>}<BR>
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回复者：门前池塘里的鱼 回复日期：2003-11-16 09:32:14
<br>内容：谢谢红苹果的帮忙，我还是不太明白，<BR>这个m_TreeList有三个对象的地址分别是0x00432654,0x00432660,0x43266c,可当把第二个对象删除后，执行了m_TreeList-&gt;GetNext(m_TreeListPosition)之后，指针就指向了一个陌生的地址，0x00432678,并不是0x43266c，不知道为什么？<BR>2003-11-16 9:33:04