public static void DeleteNodeAtBeginning()
{
if (head == null)
{
throw new Exception("Linked list is empty");
}
else
{
if (head.next != head)
{
CircularListNode newHead = head.next;
CircularListNode node = head;
while (node.next != head)
{
node = node.next;
}
node.next = newHead;
head.next = null;
head = newHead;
}
else
{
head = null;
}
}
PrintList(head);
}
public static void DeleteNodeAtEnd()
{
if (head == null)
{
throw new Exception("Linked list is empty");
}
else
{
if (head.next != null)
{
CircularListNode node = head, prev = head;
while (node.next != head)
{
prev = node;
node = node.next;
}
prev.next = head;
node.next = null;
}
else
{
head = null;
}
}
PrintList(head);
}
public static CircularListNode CreateNode(int data)
{
CircularListNode node = new CircularListNode();
node.data = data;
node.next = node;
return(node);
}
public static void InsertNodeAtEnd(int data)
{
CircularListNode newNode = CreateNode(data);
if (head == null)
{
head = newNode;
}
else
{
CircularListNode node = head;
while (node.next != head)
{
node = node.next;
}
node.next = newNode;
newNode.next = head;
}
PrintList(head);
}
public static void InsertNodeAtBeginning(int data)
{
// if linked list is empty.
CircularListNode newNode = CreateNode(data);
if (head == null)
{
head = newNode;
}
else
{
CircularListNode node = head;
while (node.next != head)
{
node = node.next;
}
node.next = newNode;
newNode.next = head;
head = newNode;
}
PrintList(head);
}
public static void PrintList(CircularListNode head)
{
if (head == null)
{
throw new Exception("Linked list is empty");
}
else
{
CircularListNode node = head;
string formattedList = string.Empty;
string selfLoop = string.Empty;
Console.WriteLine(Constants.resultPromptText);
formattedList += "-> | " + head.data + " |";
selfLoop += "|____";
for (int i = 0; i < node.data.ToString().Length; i++)
{
selfLoop += "_";
}
selfLoop += "__";
node = node.next;
while (node != head)
{
formattedList += "-> | " + node.data + " |";
selfLoop += "_____";
for (int i = 0; i < node.data.ToString().Length; i++)
{
selfLoop += "_";
}
selfLoop += "__";
node = node.next;
}
formattedList += "->";
selfLoop += "_|";
Console.WriteLine(formattedList);
Console.WriteLine(selfLoop);
}
return;
}
