Find the kth largest element in a Binary Search Tree

Traverse the tree in descending order and keep a count of number of nodes visited. When this count is equal to 'k', print the element.

void printk(struct node* root, int k)
{
    if(root == NULL)
        return;

    static int index = 0;

    printk(root->right, k);

    if(++index == k)
    {
        printf("%d\n", root->data);
        return;
    }

    printk(root->left, k);
}