题解 | #二叉树的中序遍历#
二叉树的中序遍历
https://www.nowcoder.com/practice/0bf071c135e64ee2a027783b80bf781d
/** * struct TreeNode { * int val; * struct TreeNode *left; * struct TreeNode *right; * TreeNode(int x) : val(x), left(nullptr), right(nullptr) {} * }; */ class Solution { public: /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param root TreeNode类 * @return int整型vector */ void inorder(vector<int> &res,TreeNode* root) { if(!root) return; inorder(res, root->left); res.push_back(root->val);//在中间加入数组,以实现中序 inorder(res, root->right); } vector<int> inorderTraversal(TreeNode* root) { // write code here vector<int> res; inorder(res, root); return res; } };