在计算机科学中，二叉树是每个节点最多有两个子树的树结构。本程序能够实现二叉树的创建、先序、中序、后序、层次遍历、计算高度等功能。(In computer science, a two tree is a tree structure with two subtrees at each node. This program can realize the creation of two binary tree, first order, middle order, backward order,