编写采用二叉链表形式存储的二叉树的创建、先序、中序、后序和按层遍历的算法。将一棵二叉树的所有左右子树进行交换的算法。-Prepared using binary list stored in binary form of the creation, the first sequence, the sequence, after the order and by level traversal algorithms. Will be a left sub-tree of all binary ex