【数据结构】第5章部分习题解答 包括：层次遍历二叉树，判定是否是完全二叉树，判别两棵二叉树是否相同,树的前序、后序和层次遍历（以儿子兄弟链表的方法存储）-Data structure] Chapter 5 part exercise solutions include: hierarchical binary tree traversal, to determine whether it is complete binary tree, distinguish two binary tree i