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#ifndef _BTREE_H
#define _BTREE_H
#include<stdio.h>
#include<stdbool.h>
#include<stdlib.h>
typedef char ElemType;
typedef struct node {
ElemType e;
struct node * left;
struct node * right;
} Node;
typedef struct tree {
Node * root;
int size;
} Tree;
void InitTree (Tree * ptree);
bool EmptyTree (const Tree * ptree);
int CountItem (const Tree * ptree);
bool AddItem (const ElemType e, Tree * ptree);
bool ResTree (Node * pnode);
void PrintTree (const Node * root);
#endif
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