#Leetcode# 94. Binary Tree Inorder Traversal
发布时间:2020-12-14 04:28:09 所属栏目:大数据 来源:网络整理
导读:https://leetcode.com/problems/binary-tree-inorder-traversal/ ? Given a binary tree,return the? inorder ?traversal of its nodes‘ values. Example: Input: [1,null,2,3] 1 2 / 3Output: [1,3,2] 代码: /** * Definition for a binary tree node. *
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https://leetcode.com/problems/binary-tree-inorder-traversal/ ? Given a binary tree,return the?inorder?traversal of its nodes‘ values. Example: Input: [1,null,2,3]
1
2
/
3
Output: [1,3,2]
代码: /**
* Definition for a binary tree node.
* 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> ans;
inorder(ans,root);
return ans;
}
void inorder(vector<int>& ans,TreeNode* root) {
if(root == NULL) return ;
inorder(ans,root -> left);
ans.push_back(root -> val);
inorder(ans,root -> right);
}
};
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