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📁 《Big C++ 》Third Edition电子书和代码全集-Part1

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<h2><font color="#009999">20.5 Nested Classes (cont.)</font></h2>
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<p>To nest <tt>Iterator</tt> (chptr. 16) inside <tt>List</tt>:</p>

<ul>
	<li>Will be used as:
		<blockquote><tt>
			List::Iterator pos = staff.begin();
		</tt></blockquote>
	</li>
	<li>Declare the nested class w/a forward reference in outer class:
		<blockquote>
<pre>class List
{
   . . .
   class Iterator;   // Forward reference
   . . .
};</pre>
		</blockquote>
	</li>
</ul>

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