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//叶子节点的个数
/*
(1)如果二叉树为空,返回0
(2)如果二叉树不为空且左右子树为空,返回1
(3)如果二叉树不为空,且左右子树不同时为空,返回左子树中叶子节点个数加上右子树中叶子节点个数
*/
int GetLeafNodeNum(BTree* root)
{
if(root == NULL)
return 0;
if(root->m_pLeft == NULL && root->m_pRight == NULL)
return 1;
int LeafNumOfLeft = GetLeafNodeNum(root->m_pLeft);
int LeafNumOfRight = GetLeafNodeNum(root->m_pRight);
int ret = LeafNumOfLeft + LeafNumOfRight;
return ret;
}
/*
判断量个二叉树的结构是否相同
1:如果两个二叉树都为空,那么返回true
2:如果一个二叉树为空,另外一个不为空,那么返回false
3:如果两个二叉树都不为空,那么如果它们的左子树和右子树的结果相同,返回true否则返回false
*/
bool isEqual(BTree* root1, BTree* root2)
{
if(root1 == NULL && root2 == NULL)
return true;
else if ((root1 == NULL && root2!= NULL)|| (root1 != NULL && root2 == NULL))
return false;
bool equalLeft = isEqual(root1->m_pLeft,root2->m_pLeft);
bool equalRight = isEqual(root1->m_pRight,root2->m_pRight);
return (equalLeft && equalRight);
}
完整测试代码:
// BTNumOfKLevel.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <iostream>
using namespace std;
class BTree
{
public:
int m_nValue;
BTree* m_pLeft;
BTree* m_pRight;
BTree(int m):m_nValue(m)
{
m_pLeft = m_pRight = NULL;
}
};
//二叉树的插入实现
void Insert(int value, BTree* &root)
{
if (root == NULL)
{
root = new BTree(value);
}
else if(value < root->m_nValue)
Insert(value,root->m_pLeft);
else if(value > root->m_nValue)
Insert(value,root->m_pRight);
else
;
}
//叶子节点的个数
/*
(1)如果二叉树为空,返回0
(2)如果二叉树不为空且左右子树为空,返回1
(3)如果二叉树不为空,且左右子树不同时为空,返回左子树中叶子节点个数加上右子树中叶子节点个数
*/
int GetLeafNodeNum(BTree* root)
{
if(root == NULL)
return 0;
if(root->m_pLeft == NULL && root->m_pRight == NULL)
return 1;
int LeafNumOfLeft = GetLeafNodeNum(root->m_pLeft);
int LeafNumOfRight = GetLeafNodeNum(root->m_pRight);
int ret = LeafNumOfLeft + LeafNumOfRight;
return ret;
}
/*
判断量个二叉树的结构是否相同
1:如果两个二叉树都为空,那么返回true
2:如果一个二叉树为空,另外一个不为空,那么返回false
3:如果两个二叉树都不为空,那么如果它们的左子树和右子树的结果相同,返回true否则返回false
*/
bool isEqual(BTree* root1, BTree* root2)
{
if(root1 == NULL && root2 == NULL)
return true;
else if ((root1 == NULL && root2!= NULL)|| (root1 != NULL && root2 == NULL))
return false;
bool equalLeft = isEqual(root1->m_pLeft,root2->m_pLeft);
bool equalRight = isEqual(root1->m_pRight,root2->m_pRight);
return (equalLeft && equalRight);
}
int _tmain(int argc, _TCHAR* argv[])
{
BTree* m_pRoot = new BTree(4);
Insert(3,m_pRoot);
Insert(6,m_pRoot);
Insert(1,m_pRoot);
Insert(2,m_pRoot);
Insert(5,m_pRoot);
Insert(8,m_pRoot);
Insert(7,m_pRoot);
Insert(10,m_pRoot);
BTree* m_pRoot2 = new BTree(4);
Insert(3,m_pRoot2);
Insert(6,m_pRoot2);
Insert(1,m_pRoot2);
Insert(2,m_pRoot2);
Insert(5,m_pRoot2);
Insert(8,m_pRoot2);
Insert(7,m_pRoot2);
Insert(10,m_pRoot2);
int count = GetLeafNodeNum(m_pRoot);
cout<<"叶子节点的个数为:"<<count<<endl;
cout<<"两个树的结构是否相同:"<<isEqual(m_pRoot,m_pRoot2);
getchar();
return 0;
}
C++算法之 求二叉树中叶子节点的个数 与 判断两棵二叉树是否结构相同
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原文地址:http://blog.csdn.net/djb100316878/article/details/42459177