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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="SECTION0010403000000000000000">Inorder Traversal</A></H3>
<P>
The third depth-first traversal method is
<em>inorder traversal</em><A NAME=15885> </A><A NAME=15886> </A>.
Inorder traversal only makes sense for binary trees.
Whereas preorder traversal visits the root first
and postorder traversal visits the root last,
inorder traversal visits the root <em>in between</em> visiting the left
and right subtrees:
<OL><LI> Traverse the left subtree; and then<LI> visit the root; and then<LI> traverse the right subtree.
</OL>
An inorder traversal of the tree shown in Figure <A HREF="page257.html#figtree5" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/page257.html#figtree5"><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>
visits the nodes in the following order:
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