📄 page540.html
字号:
<HTML><HEAD><TITLE>Graph Traversals</TITLE></HEAD><BODY bgcolor="#FFFFFF"> <a href="../index.html" target="_top"><img src="../icons/usins.gif" alt="Logo" align=right></a><b>Data Structures and Algorithms with Object-Oriented Design Patterns in Python</b><br><A NAME="tex2html7373" HREF="page541.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html7371" HREF="page539.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html7367" HREF="page539.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A> <A NAME="tex2html7375" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <BR><HR><H3><A NAME="SECTION0016251000000000000000">Graph Traversals</A></H3><P>Program <A HREF="page539.html#proggraphc"><IMG ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A> also defines the following traversal methods.These methods are analogous to the <tt>accept</tt>method of the container class (see Section <A HREF="page118.html#secadtscontainers"><IMG ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>).Each of these methods takes a <em>visitor</em>and performs a traversal.That is, all the <em>vertices</em> of the graph are visited systematically.When a vertex is visited, the <tt>visit</tt> method of the visitoris applied to that vertex.<P><DL ><DT><STRONG><tt>DepthFirstTraversal</tt></STRONG><DD> In addition to <tt>self</tt>, this methods accepts two arguments--a <tt>PrePostVisitor</tt> and an integer. The integer specifies the starting vertex for a depth-first traversal of the graph. <DT><STRONG><tt>BreadthFirstTraversal</tt></STRONG><DD> In addition to <tt>self</tt>, this methods accepts two arguments--a <tt>Visitor</tt> and an integer. The integer specifies the starting vertex for a breadth-first traversal of the graph.<P> </DL>Graph traversal algorithms are discussed in Section <A HREF="page548.html#secgraphtraversals"><IMG ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>.<P><HR><A NAME="tex2html7373" HREF="page541.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html7371" HREF="page539.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html7367" HREF="page539.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A> <A NAME="tex2html7375" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <P><ADDRESS><img src="../icons/bruno.gif" alt="Bruno" align=right><a href="../copyright.html">Copyright © 2003</a> by <a href="../signature.html">Bruno R. Preiss, P.Eng.</a> All rights reserved.</ADDRESS></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -