Node head;
            head = null;

            for (int i = 1; i <= 5; ++i)
            {
                if (head == null)
                {
                    head = new Node();
                    head.data = i;
                    head.next = null;
                }
                else
                {
                    Node x, p;
                    p = head;
                    while (p.next != null)
                        p = p.next;
                    x = new Node();
                    x.data = i;
                    x.next = null;
                    p.next = x;
                }
            }