📄 ds6.2.1.htm
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<title>数 据 结 构</title>
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<p align="center"><font color="#FFFFFF" size="6"><b>6.2.1 <span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: 黑体; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">二叉树的定义</span></b></font></p>
<p class="MsoNormal"><font size="5" color="#FFFFFF"><b><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman""> 二叉树（</span><span lang="EN-US">Binary
Tree</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">）是个有限元素的集合，该集合或者为空、或者由一个称为根</span><span lang="EN-US">(root)</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">的元素及两个不相交的、被分别称为左子树和右子树的二叉树组成。当集合为空时，称该二叉树为空二叉树。在二叉树中，一个元素也称作一个结点。</span></b></font></p>
<font size="5" color="#FFFFFF"><b><span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">
二叉树是有序的，即若将其左、右子树颠倒，就成为另一棵不同的二叉树。即使树中结点只有一棵子树，也要区分它是左子树还是右子树。因此二叉树具有五种基本形态，如图</span><span lang="EN-US" style="mso-bidi-font-size: 10.0pt; font-family: Times New Roman; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">6.1</span><span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">所示。</span></b></font>
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