复制代码 代码如下:
public class Node
{
public object Element;
public Node Link;

public Node()
{
Element = null;
Link = null;
}

public Node(object theElement)
{
Element = theElement;
Link = null;
}
}

复制代码 代码如下:
public class LinkedList
{
//头结点
protected Node Header;

private int count;

public LinkedList()
{
count = 0;
Header = new Node("header");
Header.Link = Header;
}

public bool IsEmpty()
{
return (Header.Link == null);
}

public void MakeEmpty()
{
Header.Link = null;
}

public void PrintList()
{
Node current = new Node();
current = Header;
while (current.Link.Element.ToString() != "header")
{
Console.WriteLine(current.Link.Element);
current = current.Link;
}
}

private Node FindPrevious(object n)
{
Node current = Header;
while (!(current.Link == null) && current.Link.Element != n)
{
current = current.Link;
}
return current;
}

private Node Find(object item)
{
Node current = new Node();
current = Header.Link;
while (current.Element != item)
{
current = current.Link;
}
return current;
}

public void Insert(object newItem, object after)
{
Node current = new Node();
Node newNode = new Node(newItem);
current = Find(after);
newNode.Link = current.Link;
current.Link = newNode;
count++;
}

public void Remove(object n)
{
Node p = FindPrevious(n);
if (!(p.Link == null))
{
p.Link = p.Link.Link;
count--;
}
}

public void InsertFirst(object n)
{
Node current = new Node(n);
current.Link = Header;
Header.Link = current;
count++;
}

public Node Move(int n)
{
Node current = Header.Link;
Node tmp;
for (int i = 0; i <= n; i++)
{
current = current.Link;
}
if (current.Element.ToString() == "header")
{
current = current.Link;
}
tmp = current;
return tmp;
}

public Node GetFirst()
{
return Header;
}
}