1.对任意给定的二叉树（顶点数自定）建立它的二叉链表存储结构，并实现二叉树的先序、中序、后序三种遍历，输出三种遍历的结果。 2． 求二叉树高度、结点数、度为1的结点数和叶子结点数-1. On any given binary tree (top points from the set) to establish its binary linked list storage structure and to achieve binary tree preorder, inorder, pos