利用广义表建立的二叉树，将碱基作为他的节点，实现了以树形输出，并且交换了左右子树，利用非递归中序遍历和先序遍历。-The establishment of the binary tree using the generalized form, the base node as he realized to the output tree, and the exchange of left and right sub-tree in the use of non-recursive travers