输入一颗二叉树和一个整数,打印出二叉树中结点值的和为输入整数的所有路径。路径定义为从树的根结点开始往下一直到叶结点所经过的结点形成一条路径。
#include <iostream> #include<stdio.h> #include<vector> using namespace std; struct BinaryTreeNode{ int value; BinaryTreeNode* left; BinaryTreeNode* right; }; //递归判断路劲和是否为预期值,函数返回时去除根节点的指,路径跟着删除 void findPath(BinaryTreeNode* root,int expectedNum,vector<int>& path,int& currentSum){ currentSum+=root->value; path.push_back(root->value); bool isLeaf = root->left==NULL&&root->right==NULL; if(currentSum==expectedNum&&isLeaf){ printf("A path is found: "); vector<int>::iterator iter = path.begin(); for(;iter!=path.end();++iter){ printf("%d\t",*iter); } printf("\n"); } if(root->left){ findPath(root->left,expectedNum,path,currentSum); } if(root->right){ findPath(root->right,expectedNum,path,currentSum); } currentSum -= root->value; path.pop_back(); } //主程序 void findPath(BinaryTreeNode* root ,int expectedNum){ if(root==NULL)return; vector<int> path; int currentSum = 0; findPath(root,expectedNum,path,currentSum); } int main(){ return 0; }
时间: 2024-10-24 20:21:59