/// <summary>
/// Adds a new integer to the list
/// </summary>
/// <param name="intVal">The value to add to the list</param>
public void Add(int intVal)
{
IntNode node = new IntNode(intVal);
// is this the first element in the list?
if (head == null)
{
head = tail = node;
count++;
return;
}
tail.Next = node;
tail = node;
count++;
}
public bool MoveNext()
{
if (currentNode == null)
{
currentNode = head;
return(currentNode != null);
}
if (currentNode.HasNext)
{
currentNode = currentNode.Next;
return(true);
}
return(false);
}
/// <summary>
/// Returns the fifth last element in the list, using no more than one pass through the list
/// </summary>
/// <returns>fifth last element in the list</returns>
public int GetFifthLast()
{
if (Count < 5)
{
throw new IndexOutOfRangeException("List must contain at least 5 elements");
}
if (count == 5)
{
return(head.Value);
}
IntNode current = head;
for (int i = 0; i < (Count - 5); i++)
{
current = current.Next;
}
return(current.Value);
}
public void Dispose()
{
currentNode = null;
}
internal LinkedIntListEnumerator(IntNode headNode)
{
head = headNode;
}
public void Reset()
{
currentNode = null;
}