程序的主要功能

1 按照二叉链表存贮创建二叉树

2 二叉树的遍历——先序中序后序 三种不同方式遍历

3 统计总结点与叶子节点的个数

4 树状打印二叉树

注释清楚-The main functions of the program

1 according to the binary linked list storage create binary tree

2 binary tree traverse--first order after order sequence three different ways to traverse

3 statistical summary point and leaves the number of nodes

4 tree print binary tree

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