二叉树按照二叉链表方式存储，编写算法，将二叉树左右子树进行交换。实现建立二叉树，输出未交换前的中序遍历序列、交换左右子树、输出交换后的中序序列功能。-Binary tree binary list stored in accordance with, the preparation method, the binary exchange of left and right subtrees. To achieve the establishment of a binary tree, outpu