Edit where a pointer points within a function

Question

I have a pointer to a struct object in C++.

 node *d=head;

I want to pass that pointer into a function by reference and edit where it point

Answer 1

Pass it by reference:

void foo(node*& headptr)
{
     // change it
     headptr = new node("bla");
     // beware of memory leaks :)
}