分析的是实例

#include<stdio.h>

#include<stdlib.h>



typedef struct BST* tree_pointer //定义数据类型

typedef struct BST{

int key

tree_pointer left

tree_pointer right

}BST



tree_pointer CreateBST(tree_pointer root, int data){ // 创建一个根

root = (tree_pointer)malloc(sizeof(BST))

root->key = data

root->left = NULL -Structure in the data analysis of the role of tree