二叉搜索树删除

Question

I am a beginner in programming and currently learning about bst. I have found several functions which delete bst, but they seemed to me overcomplexed. So i am interested if my own code cleans all the memory, every pointer and value of a binary search tree.

void deletebst (Node*& node)
{
if (node!=NULL)
{
deletebst (node->ldes); //deletes a left descendant recursively
deletebst (node->rdes); //same but with the right one
delete node; //deletes the value which a pointer 'node' points to
node=NULL; //sets a pointer 'node' to NULL, so deletes a pointer itself
}
}

Answer 1

As pointed out in the comments section, there's no need to set node = NULL, after it's been deleted. The rest of the code is fine. Cheers!