both asterisk and ampersand in a parameter c++

Question

I am reading a book about Binary Search Tree and something weird came up.

class BST
{
public:
   void insert(const Comparable & item)

private:
   Binary         


        

Answer 1

It's reference to pointer, you can change pointer in this function and it will changed outside. Simple example http://liveworkspace.org/code/1EfD0Q$8