下面是实现的代码
using System;
namespace dataStrut
{
class Program
{
static void Main(string[] args)
{
//输出链表
ListClass lc = new ListClass();
lc.AppendNode(1);
lc.AppendNode(2);
lc.MoveFrist();
for (int i = 0; i < lc.ListCount; i++)
{
Console.WriteLine(lc.GetCurrentValue());
lc.MoveNextNode();
}
}
}
//定义节点
public class ListNode
{
public ListNode(int NewValue)
{
Value = NewValue;
}
/// <summary>
/// PreviousNode node
/// </summary>
public ListNode PreviousNode;
/// <summary>
/// NextNodeNode
/// </summary>
public ListNode NextNode;
/// <summary>
/// Value
/// </summary>
public int Value;
}
public class ListClass
{
/// <summary>
/// Init Data
/// </summary>
public ListClass()
{
ListCountValue = 0;
Head = null;
Last = null;
}
/// <summary>
/// Head
/// </summary>
private ListNode Head;
/// <summary>
/// last
/// </summary>
private ListNode Last;
/// <summary>
/// current
/// </summary>
private ListNode Current;
/// <summary>
/// list number
/// </summary>
private int ListCountValue;
/// <summary>
/// add number to last
/// </summary>
public void AppendNode(int DataValue)
{
ListNode NewNode = new ListNode(DataValue);
if (IsNull())
//first null
{
Head = NewNode;
Last = NewNode;
}
else
{
Last.NextNode = NewNode;
NewNode.PreviousNode = Last;
Last = NewNode;
}
Current = NewNode;
//list add one
ListCountValue += 1;
}
/// <summary>
/// delete now
/// </summary>
public void Delete()
{
//Null
if (!IsNull())
{
//delFirst
if (IsBof())
{
Head = Current.NextNode;
Current = Head;
ListCountValue -= 1;
return;
}
//delLast
if (IsEof())
{
Last = Current.PreviousNode;
Current = Last;
ListCountValue -= 1;
return;
}
//delMiddle
Current.PreviousNode.NextNode = Current.NextNode;
Current = Current.PreviousNode;
ListCountValue -= 1;
return;
}
}
/// <summary>
/// moveNext
/// </summary>
public void MoveNextNode()
{
if (!IsEof()) Current = Current.NextNode;
}
/// <summary>
///movePreviouse
/// </summary>
public void MovePreviousNode()
{
if (!IsBof()) Current = Current.PreviousNode;
}
/// <summary>
/// movefirst
/// </summary>
public void MoveFrist()
{
Current = Head;
}
/// <summary>
/// moveLast
/// </summary>
public void MoveLast()
{
Current = Last;
}
/// <summary>
/// check null
/// </summary>
public bool IsNull()
{
if (ListCountValue == 0)
return true;
return false;
}
/// <summary>
/// is last
/// </summary>
public bool IsEof()
{
if (Current == Last)
return true;
return false;
}
/// <summary>
/// is head
/// </summary>
public bool IsBof()
{
if (Current == Head)
return true;
return false;
}
public int GetCurrentValue()
{
return Current.Value;
}
/// <summary>
/// get list node number
/// </summary>
public int ListCount
{
get
{
return ListCountValue;
}
}
/// <summary>
/// clear list
/// </summary>
public void Clear()
{
MoveFrist();
while (!IsNull())
{
Delete();
}
}
/// <summary>
/// 在当前位置前插入数据
/// </summary>
public void Insert(int DataValue)
{
ListNode NewNode = new ListNode(DataValue);
if (IsNull())
{
AppendNode(DataValue);
return;
}
if (IsBof())
{
NewNode.NextNode = Head;
Head.PreviousNode = NewNode;
Head = NewNode;
Current = Head;
ListCountValue += 1;
return;
}
NewNode.NextNode = Current;
NewNode.PreviousNode = Current.PreviousNode;
Current.PreviousNode.NextNode = NewNode;
Current.PreviousNode = NewNode;
Current = NewNode;
ListCountValue += 1;
}
/// <summary>
/// ads insert
/// </summary>
public void InsertAscending(int InsertValue)
{
if (IsNull())
{
AppendNode(InsertValue);
return;
}
MoveFrist();
if ((InsertValue < GetCurrentValue()))
{
Insert(InsertValue);
return;
}
while (true)
{
if (InsertValue < GetCurrentValue())
{
Insert(InsertValue);
break;
}
if (IsEof())
{
AppendNode(InsertValue);
break;
}
MoveNextNode();
}
}
/// <summary>
/// desc insert
/// </summary>
public void InsertUnAscending(int InsertValue)
{
if (IsNull())
{
AppendNode(InsertValue);
return;
}
MoveFrist();
if (InsertValue > GetCurrentValue())
{
Insert(InsertValue);
return;
}
while (true)
{
if (InsertValue > GetCurrentValue())
{
Insert(InsertValue);
break;
}
if (IsEof())
{
AppendNode(InsertValue);
break;
}
MoveNextNode();
}
}
}
}
也可以用NET下的List类