数据结构：查找表的逻辑结构和存储结构。实现折半查找算法：建立一棵二叉排序树，输入给定值，在该二叉排序树查找，如不存在该值，则在二叉排序树中插入；如存在该值，则返回节点；实现删除找到节点的算法。-Data structures: a lookup table of the logical structure and storage structure. Binary search algorithm: the establishment of a binary sort tree, enter the given value does not exist in the binary sort tree to find, such as the value inserted in the binary sort tree　such as the existence of this value is returned node　achieve delete find node algorithm.