Data Structure Binary Tree: Check for Children Sum Property in a Binary Tree

http://www.geeksforgeeks.org/check-for-children-sum-property-in-a-binary-tree/

 #include <iostream>
 #include <vector>
 #include <algorithm>
 #include <queue>
 #include <stack>
 using namespace std;

 struct node {
     int data;
     struct node *left, *right;
     node() : data(), left(NULL), right(NULL) { }
     node(int d) : data(d), left(NULL), right(NULL) { }
 };

 void print(node *node) {
     if (!node) return;
     print(node->left);
     cout << node->data << " ";
     print(node->right);
 }

 bool isSumproperty(node *root) {
     if (!root || !root->left && !root->right) return true;
     int sum = ;
     sum += root->left != NULL? root->left->data : ;
     sum += root->right != NULL? root->right->data : ;
     return sum == root->data && isSumproperty(root->left) && isSumproperty(root->right);
 }

 int main() {
     struct node* root = new node();
     root->left = new node();
     root->right = new node();
     root->left->left = new node();
     root->left->right = new node();
     root->right->right = new node();
     if (isSumproperty(root)) cout << "yes" << endl;
     else cout << "NO" << endl;
     return ;
 }