二叉树的建立与遍历，以及求二叉树的叶子节点数，节点数，树的深度等。并用主函数调用各个子函数，功能非常全。建立二叉树的原理是先把二叉树看成完全二叉树，然后对各节点编号，利用二叉树的性质建立二叉树。-Establishment of the binary tree traversal, and the demand nodes in binary tree leaves, nodes, depth of the tree. With the main function calls each sub function, function is all. The principle is to first build a binary tree binary tree as complete binary tree, then the node number, the nature of the establishment of a binary tree using a binary tree.