数据结构之二叉树（二）

 输出二叉树中所有从根结点到叶子结点的路径

 

#include <iostream>  
#include <vector>  
using namespace std;  

struct BiTNode  
{  
    char m_value;  
    BiTNode *m_left;  
    BiTNode *m_right;  
};  

//先序创建二叉树  
void CreatBiTree(BiTNode *&root)  
{     
    char nValue = 0;  
    cin >> nValue;  
    if ('#' == nValue)  
    {  
        return;  
    }  
    else  
    {  
        root = new BiTNode();  
        root->m_value = nValue;  
        CreatBiTree(root->m_left);  
        CreatBiTree(root->m_right);  
    }     
}  

//输出二叉树中所有从根结点到叶子结点的路径(递归)  
void FindAllPath(BiTNode *pRoot, vector<char> path)  
{  
    if (pRoot != NULL)  
    {  
        path.push_back(pRoot->m_value);  
        if (pRoot->m_left == NULL && pRoot->m_right == NULL)  
        {  
            for (vector<char>::iterator iter=path.begin(); iter!=path.end(); iter++)  
            {  
                cout << *iter << " ";  
            }  
            cout << endl;  
            return;  
        }  
        else  
        {  
            FindAllPath(pRoot->m_left, path);  
            FindAllPath(pRoot->m_right, path);  
        }  
    }  
}  

int main()  
{  
    BiTNode *pRoot = NULL;  
    vector<char> path;  
    CreatBiTree(pRoot);  
    cout << "二叉树中从根到叶子结点的所有路径如下：" << endl;  
    FindAllPath(pRoot, path);  
    system("pause");  
    return 0;  
}