🚀 go-pugleaf

I am trying to change the value of a pointer in a function. I successfully
change it in the function but when I get back to the calling function it
returns to the original value.

This is the calling function from llist.cpp (a test harness)

   if ( my_llist.i_traverse( from_where, data_ptr ))
   {
    element = data_ptr->storage;
    cout << " Traversed node contained: " << element << ". ";
   }else cout << "\nThere was an error, try again.\n";
   break;

This is the called function from llist.h.

// *************************************************
// traverse a list, if from_where = 1 then increment data_ptr by one node
else return
// list head in data_ptr.
// *************************************************
BOOLEAN llist::i_traverse ( BOOLEAN from_where, NODE *data_ptr )
{
 int pos = 0;
 int count;
 NODE *top_ptr = LinkedList;
 NODE *temp_ptr = LinkedList;
// NODE *temp_ptr2 = *data_ptr;


 count = llist::i_size();
 if ( count <= 0 )
 {
  return ( FALSE ); /* position out of range */
 }

 if (data_ptr == NULL)
 {
  data_ptr = LinkedList;
  return ( TRUE );
 }

 if ( from_where == 0 )
 {
  data_ptr = LinkedList;
  return ( TRUE );
 }


 if ( data_ptr->next != NULL )
 {
  data_ptr = temp_ptr->next;
  return ( TRUE );
 }
 else
 {
  return ( FALSE );
 }
}

Thanks,

Steve