（1）实现二叉树的构造过程，并打印出二叉树 

（2）对该二叉树分别用层序、前序、中序和后序四种不同的方法进行遍历； 

（3）将该二叉树的所有左右子树进行交换，得到新的二叉树，并打印出该二叉树； 

（4）对新获得的二叉树分别用层序、前序、中序和后序四种不同的方法进行遍历。-(1) the construction process to achieve the two fork tree, and print out the two fork tree

(2) on the two fork tree were used to sequence, preorder, inorder and postorder traversal four different methods

(3) the two fork tree all the exchange of left and right subtrees, get the new two fork tree, and print out the two fork tree

(4) four different methods are used to carry out the sequence, the sequence, the sequence and the order of the new two fork tree.