檢視子树的原始碼

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| style="background: #FF2400" align= center|  '''<big>子树 </big>'''
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|<center><img src=https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fss2.meipian.me%2Fusers%2F3648853%2F424ec090a2734aaa9b1c11a0bb6eea83.jpg%3Fmeipian-watermark%2Fbucket%2Fivwen%2Fkey%2FdXNlcnMvMzY0ODg1My80MjRlYzA5MGEyNzM0YWFhOWIxYzExYTBiYjZlZWE4My5qcGc%3D%2Fnickname%2F54eVLi4u%2Fuserid%2FMzY0ODg1Mw%3D%3D%2Fsign%2Fcb4776ad2bc9f0f7d2b8ee6406559f8a&refer=http%3A%2F%2Fss2.meipian.me&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1664508871&t=b6828aed8098b21c4bdc35a2fd18e5bb width="300"></center>
<small>[https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fss2.meipian.me%2Fusers%2F3648853%2F424ec090a2734aaa9b1c11a0bb6eea83.jpg%3Fmeipian-watermark%2Fbucket%2Fivwen%2Fkey%2FdXNlcnMvMzY0ODg1My80MjRlYzA5MGEyNzM0YWFhOWIxYzExYTBiYjZlZWE4My5qcGc%3D%2Fnickname%2F54eVLi4u%2Fuserid%2FMzY0ODg1Mw%3D%3D%2Fsign%2Fcb4776ad2bc9f0f7d2b8ee6406559f8a&refer=http%3A%2F%2Fss2.meipian.me&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1664508871&t=b6828aed8098b21c4bdc35a2fd18e5bb 来自网络的图片]</small>
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树是一种重要的非线性数据结构，直观地看，它是数据元素（在树中称为结点）按分支关系组织起来的结构，很象[[自然]]界中的树那样。树结构在客观世界中广泛存在，如人类社会的族谱和各种社会组织机构都可用树形象表示。

树在计算机领域中也得到广泛应用，如在[[编译]]源程序如下时，可用树表示源源程序如下的语法结构。又如在数据库系统中，树型结构也是信息的重要组织形式之一。一切具有层次关系的问题都可用树来描述。满二叉树，完全二叉树，排序二叉树。