二叉树类及其实现以二叉链表为存储结构实现二叉树类和成员函数，

设计计算二叉树结点、将二叉树每个结点的左右子树交换、求二叉树高度的算法-Binary tree class and its implementation to the list for the storage structure of the binary classes and member functions to achieve a binary tree, binary tree node design calculations, the binary tree each node of the left and right sub-tree exchange, find a binary tree height algorithm