//Prints the current list in reversed order
public void PrintReversed()
{
CustomNode <T> current = tail;
for (int i = count; i > 0; i--)
{
Console.WriteLine(current.Data);
current = current.Prev;
}
}
//inserts a new node to the list
//Param name "date, the data to insert, and "index", the location of the data
public void Insert(T data, int index)
{
if (head == null)
{
add(data);
return;
}
else if (index < 0)
{
throw new IndexOutOfRangeException(" Invalid");
}
else if (index >= count)
{
add(data);
return;
}
CustomNode <T> previous = head;
CustomNode <T> current = head;
int position = 0;
while (position < count)
{
if (position == index)
{
CustomNode <T> newNode = new CustomNode <T>(data);
if (position == 0)
{
newNode.Next = head;
head.Prev = newNode;
head = newNode;
}
else
{
newNode.Next = current;
previous.Next = newNode;
newNode.Prev = current.Prev;
current.Prev = newNode;
count++;
position = count;
}
}
position++;
previous = current;
current = current.Next;
}
}
//Returns the data value from the node at the index specified
public T GetData(int index)
{
if (index < 0 || index >= count)
{
throw new IndexOutOfRangeException("Invalid");
}
// Loop through the nodes until we get
// to the node at index
CustomNode <T> current = head;
for (int i = 0; i < index; i++)
{
current = current.Next;
}
// Return the data of the current node
return(current.Data);
}
//Removing elements from the list and returning its data
//Param name "index" , the location of the index to remove from
public T RemoveAt(int index)
{
if (index < 0 || index >= count)
{
throw new IndexOutOfRangeException("Index was invalid");
}
else if (index == 0)
{
CustomNode <T> temp = head;
head = head.Next;
count--;
return(temp.Data);
}
//if index is the last data in the list
else if (index == count - 1)
{
CustomNode <T> temp = tail;
tail = tail.Prev;
tail.Next = null;
count--;
return(temp.Data);
}
//if the index points to a node in the middle of the list
else
{
T tempdata = GetData(index);
CustomNode <T> current = head;
for (int i = 0; i < index; i++)
{
current = current.Next;
}
current.Next.Prev = current.Prev;
current.Prev.Next = current.Next;
count--;
return(tempdata);
}
}
//Adds a new node object to the list
//param name "data"
public void add(T data)
{
CustomNode <T> node = new CustomNode <T>(data);
if (count == 0)
{
head = node;
tail = node;
}
else if (count == 1)
{
head.Next = node;
tail = node;
tail.Prev = head;
}
else
{
node.Prev = tail;// current tail
tail.Next = node;
tail = node; // new tail
}
count++;
}
//Clears the entire list
public void Clear()
{
head = null;
tail = null;
count = 0;
}
public CustomNode(T data)
{
this.data = data;
next = null;
}
static void Main(string[] args)
{
//Creates Custom Linked List
CustomLinkedList <string> words = new CustomLinkedList <string>();
Console.WriteLine("Type Something:");
String input;
//Looks for a specific sets of commands and executes the right function from the LinkedList class.
while (true)
{
input = Console.ReadLine();
if (input == "quit" || input == "q")
{
Console.WriteLine("The loop has ended");
return;
}
else if (input == "print")
{
Console.WriteLine(" The following items are in the list");
for (int i = 0; i < words.Count; i++)
{
Console.WriteLine(words.GetData(i));
}
}
else if (input == "count")
{
Console.WriteLine(" There are currently " + words.Count + " items in the list");
}
else if (input == "clear")
{
words.Clear();
Console.WriteLine("The list has been cleared");
}
else if (input == "remove")
{
Random t = new Random();
words.RemoveAt(t.Next(words.Count));
Console.WriteLine("One element has been randomly removed from the list");
}
else if (input == "reverse")
{
Console.WriteLine("The following items are in the list in reversed order");
words.PrintReversed();
}
else if (input == "scramble")
{
//Removes a single random element from the list and insert it back into the list at another random index
//Press print after the scramble command to see the results
Random t = new Random();
int randomIndex = t.Next(words.Count);
CustomNode <string> temp = new CustomNode <string>(words.GetData(randomIndex));
words.RemoveAt(randomIndex);
int newrandom = t.Next(words.Count);
words.Insert(temp.Data, newrandom);
}
//simply adds any input to the list other than the command
else
{
words.add(input);
}
}
}
