本课程设中的二叉排序树，一共要实现四项基本的功能。

它们分别是二叉顺序树的创建、中序遍历、查找结点和删除结点。-This course is set up in the binary sort tree to achieve a total of four basic functions.

They are the creation of a binary tree sequence, the preorder, find nodes and delete nodes.