实现二叉树的基本功能，如构造一棵二叉树，在树中插入结点，先序后序中序遍历二叉树等功能-The basic function of the realization of binary tree, such as a binary tree structure, inserted in the tree nodes, in sequence after the first order binary tree traversal functions

哈夫曼树的构造算法,提供对二叉排序树的遍历。-Hoffmann tree structure algorithm，Provide for binary sort tree traverse.