一些数据结构算法集合：普通链表结点、双向循环链表结点、二叉树结点、 树结点、双向循环链表、哈希表、二叉搜索树等。-A collection of some data structure algorithms: ordinary linked list of nodes, two-way circular linked list of nodes, the binary tree node, tree node, two-way circular linked lists, hash tables