实现二叉树的构造程序。二叉树由一个根节点和根节点上的左子树和右子树组成。该段代码能够构造一个二叉树并计算节点数目、树的高度以及显示节点。-Procedures to achieve binary tree structure. From left sub-tree of a binary tree root and root on the composition and the right subtree. This code can construct a binary tree and ca