C++ Help.. Double linked list

bool LinkedList::next()
{
Node *prev, *temp;

temp->ptr = static_cast<int>(prev->ptr) ^ static_cast<int>(current->ptr);
prev->ptr = current->ptr;
current->ptr = temp->ptr;
}

class Node
{
  public:

    Node(){}
    ~Node(){}

    // stores the value for the node
    int value;
   
    // stores both the next and previous pointers, combined with the xor operator
    Node *ptr;
};