这是我们数据结构的实验，内容报告：分别采用递归和非递归算法建立二叉树；采用先序、中序和后序三种方式遍历该二叉树；按层次遍历该二叉树。

-This is the data structure of the experiment, the contents of the report: were used to establish the recursive and non recursive algorithm binary tree　using the first order, the order and the order of three ways to traverse the binary tree　by level traversal of the binary tree.