这是一个通过c++编译的能够实现二叉树的先序，中序，后序遍历的程序，输入时要按照例子的要求输入，否则不可辨认-This is a through c++ compiler can be achieved in the first order binary tree, in order, after the traversal of the procedure, type the request in accordance with the examples of input, can not identify