problem 94 solved

code.cpp

@@ -136,3 +136,23 @@ bool isValidSudoku(vector<vector<char>>& board) {
 	}
 	return true;
 }
+
+//94. Binary Tree Inorder Traversal
+//inorder traversd binary tree, solved by watched the answer
+class Solution {
+public:
+    vector<int> inorderTraversal(TreeNode* root) {
+        if(root){
+            if (root->left){
+                inorderTraversal(root->left);
+            }
+            result.push_back(root->val);
+             if(root->right){
+                inorderTraversal(root->right);
+            }
+        }
+        return result;
+    }
+    private:
+    vector<int> result;
+};