常用二叉树算法，包括二叉树的创建，递归遍历，非递归遍历-Commonly used two fork tree algorithm, including the creation of two fork tree, recursive traversal, non recursive traversal, and so on

包含二叉树的相关知识，包括创建，销毁，删除等知识，不错的代码-Contains two tree related knowledge, including the creation, destruction, delete and other knowledge, good code