binary expression tree 二元运算树 ; 二元表式树
Understanding absolute values in expression parsing to binary tree?
了解表达式的解析树的绝对值？
The concepts such as mathematical expression, stack operation and binary tree traversal must be presented in data structure.
数学表达式、栈的操作、二又树的遍历，这几个概念在数据结构的教材中是不可缺少的。
First, classic string matching algorithms and regular expression matching algorithms are studied; second a binary sort tree string matching algorithm is proposed and realized.
终结符号处理过程中，深入地研究了字符串匹配算法和正则表达式匹配算法，并实现了二叉排序树字符串匹配算法。
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