#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>

typedef	int	ElemType;			//数据类型
typedef	int		Status;			//返回值类型

//定义二叉树结构
typedef struct BiTNode{
	ElemType	data;					//数据域
	struct BiTNode	*lChild, *rChlid;	//左右子树域
}BiTNode, *BiTree;

//先序创建二叉树
Status CreateBiTree(BiTree *T)
{
	ElemType ch;
	ElemType temp;

	scanf("%d", &ch);
	temp = getchar();

	if (-1 == ch)
		*T = NULL;
	else
	{
		*T = (BiTree)malloc(sizeof(BiTNode));
		if (!(*T))
			exit(-1);

		(*T)->data = ch;
		printf("输入%d的左子节点：", ch);
		CreateBiTree(&(*T)->lChild);
		printf("输入%d的右子节点：", ch);
		CreateBiTree(&(*T)->rChlid);
	}

	return 1;
}

//先序遍历二叉树
void TraverseBiTree(BiTree T)
{
	if (NULL == T)
		return ;
	printf("%d ", T->data);
	TraverseBiTree(T->lChild);
	TraverseBiTree(T->rChlid);

}

//中序遍历二叉树
void InOrderBiTree(BiTree T)
{
	if (NULL == T)
		return ;
	InOrderBiTree(T->lChild);
	printf("%d ", T->data);
	InOrderBiTree(T->rChlid);

}

//后序遍历二叉树
void PostOrderBiTree(BiTree T)
{
	if (NULL == T)
		return ;
	PostOrderBiTree(T->lChild);
	PostOrderBiTree(T->rChlid);
	printf("%d ", T->data);

}


//二叉树的深度

int TreeDeep(BiTree T)
{
	int deep = 0;
	if(T)
	{
		int leftdeep = TreeDeep(T->lChild);
		int rightdeep = TreeDeep(T->rChlid);
		deep = leftdeep>=rightdeep?leftdeep+1:rightdeep+1;
	}
	return deep;
}

//求二叉树叶子结点个数

int Leafcount(BiTree T,int &num)
{  
	if(T)
	{
		if(T->lChild ==NULL &&T->rChlid==NULL)	
			num++;
		Leafcount(T->lChild,num);
		Leafcount(T->rChlid,num);

	}
	return num;
}
//主函数
int main(void)
{
	BiTree T;
	BiTree *p = (BiTree*)malloc(sizeof(BiTree));
	int deepth,num=0 ;
	printf("请输入第一个结点的值,-1表示没有叶结点:\n");
	CreateBiTree(&T);
	printf("先序遍历二叉树:\n");
	TraverseBiTree(T);
	printf("\n");
	printf("中序遍历二叉树:\n");
	InOrderBiTree(T);
	printf("\n");
	printf("后序遍历二叉树:\n");
	PostOrderBiTree(T);
	printf("\n");
	deepth=TreeDeep(T);
	printf("树的深度为:%d",deepth);
	printf("\n");
	Leafcount(T,num);
	printf("树的叶子结点个数为:%d",num);
	printf("\n");
	return 0;
}

C语言实现二叉树的基本操作---创建、遍历、求深度、求叶子结点,布布扣,bubuko.com

C语言实现二叉树的基本操作---创建、遍历、求深度、求叶子结点