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<b>Data Structures and Algorithms
with Object-Oriented Design Patterns in C++</b><br>
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<H3><A NAME="SECTION0010614000000000000000"><tt>Accept</tt> Member Function</A></H3>
<P>
The <tt>Tree</tt> class replaces the functionality provided
by the single function <tt>Accept</tt>
with two different kinds of traversal.
Whereas the <tt>Accept</tt> function
is allowed to visit the nodes of a tree in any order,
the traversals visit the nodes in two different, but well-defined orders.
Consequently, we have chosen to provide a default
implementation of the <tt>Accept</tt> function
which does a preorder traversal.
<P>
Program <A HREF="page271.html#progtree3c" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/page271.html#progtree3c"><IMG ALIGN=BOTTOM ALT="gif" SRC="cross_ref_motif.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/icons/cross_ref_motif.gif"></A> shows the implementation
of the <tt>Accept</tt> member function of the <tt>Tree</tt> class.
This function uses the <tt>PreOrder</tt> adapter
to pass on a given visitor to the <tt>DepthFirstTraversal</tt> routine.
<P>
<P><A NAME="16496"> </A><A NAME="progtree3c"> </A> <IMG WIDTH=575 HEIGHT=50 ALIGN=BOTTOM ALT="program16317" SRC="img1164.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/img1164.gif" ><BR>
<STRONG>Program:</STRONG> <tt>Tree</tt> Class <tt>Accept</tt> Member Function Definition<BR>
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