Given a binary tree, return the inorder traversal of its nodes‘ values.
For example:
Given binary tree {1,#,2,3}
,
1 2 / 3
return [1,3,2]
.
Note: Recursive solution is trivial, could you do it iteratively?
confused what "{1,#,2,3}"
means? >
read more on how binary tree is serialized on OJ.
用非递归的方法实现二叉树的中序遍历。
/** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Solution { public: vector<int> inorderTraversal(TreeNode *root) { vector<int>result; stack<TreeNode*>st; TreeNode*node=root; //左孩子不断入栈 while(node){st.push(node); node=node->left;} while(!st.empty()){ //访问栈顶元素 node=st.top(); st.pop(); result.push_back(node->val); node=node->right; //右子树的左孩子不断入栈 while(node){st.push(node); node=node->left;} } return result; } };
LeetCode: Binary Tree Inorder Traversal [094],布布扣,bubuko.com
LeetCode: Binary Tree Inorder Traversal [094]
原文地址:http://blog.csdn.net/harryhuang1990/article/details/27958187