c++各种树的总结BST AVL RB-tree

http://www.cnblogs.com/gaochundong/p/binary_search_tree.html

http://blog.csdn.net/sgbfblog/article/details/7773103

binary search tree 前序遍历 中序遍历 后序遍历 层次遍历 递归与非递归写法

(java版本) https://biaobiaoqi.github.io/blog/2013/04/27/travsal-binary-tree/