How to print all right nodes of tree?

Question

The input tree is as shown below
            40
            / \
        20      60
        / \       \
    10      30      80
      \            /  \ 
       15        70    90

Output: 15 30 60 80 90

Answer 1

void printRight(struct node* root)
{
    if (root == null) 
       return;

    if (root->left)
       printRight(root->left);

    if (root->right)
    {
       cout >> root->right.data();
       printRight(root->right);
    }
}

Answer 2

void print_right(Node *root){
   if(!root)
         return;

 if(root->right)
        printf("%d",root->right->data);

print_right(root->left);
print_right(root->right);
}