二叉树的生成与遍历-binary tree generation and traversal

实现树与二叉树的转换的实现。以及树的前序、后序的递归、非递归算法，层次序的非递归算法的实现(Implementation of tree and two branch tree conversion. As well as the recursive and non recursive algorithms of the pre order and backward order of the tree, and the realization of the non recursive algor