/// <summary>
/// Attaches a new node to the next property of head.
/// </summary>
/// <param name="head">head: Node (the tail node in the list)</param>
/// <param name="data">data: int (the data to be stored in the new node)</param>
/// <returns></returns>
private static Node AttachNodeToList(Node head, int data)
{
Node temp = new Node();
temp.Data = data;
temp.Next = null;
// If the list has not been created yet, set head as the first
// node.
if (head == null)
{
head = temp;
}
// Else go to the last node in the list and set the next node
// to the new node.
else
{
Node temp2 = head;
while (temp2.Next != null)
{
temp2 = temp2.Next;
}
temp2.Next = temp;
}
return head;
}
/// <summary>
/// Prints the entire list pointed to by the supplied Node object.
/// </summary>
/// <param name="head">head: Node (the head object of the linked list)</param>
private static void DisplayLinkedList(Node head)
{
while (head != null)
{
Console.Write("{0}, ", head.Data);
head = head.Next;
}
}
/// <summary>
/// Reverses a Linked List with the current head supplied as a paramter.
/// </summary>
/// <param name="head">head: Node (the head of the Linked List)</param>
/// <returns>the head of the reversed Linked List</returns>
private static Node ReverseLinkedList(Node head)
{
// Set the current node to head, meaning the first element in the Linked List.
Node current = head;
// Previous is set to null, as there are no preceeding nodes of head.
Node previous = null;
Node next = null;
while (current != null)
{
// Save the address of the next node, so we don't lose the link.
next = current.Next;
// Set the next node of the current node to its previous node
// thus effectively changing the direction of the link.
current.Next = previous;
// Change the previous node to the current node, so that we can
// change the direction of the next link to previous.
previous = current;
// Go to the next node in the list, and repeat the process.
current = next;
}
// The head will be the final node of the list, saved in previous
head = previous;
return head;
}
