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 i