动态查找表的设计与实现：
实现抽象数据类型：二叉查找树。
实现下列操作:构造空表、销毁表、搜索指定关键字的元素、插入新元素、删除指定关键字的元素、遍历表中所有元素。,Dynamic Look-Up Table Design and Implementation: To achieve the abstract data types: Binary Search Tree. To achieve the following: Construction empty tables, the destruction of form, specify a keyword search element, insert new elements, delete elements specify a keyword, traverse all the elements of the table.