C# 双向链表的实现
类数据
public class Objects
{
private int number; /**//* 货物编号 */
private string name; /**//* 货物名称 */
private int counter; /**//* 货物数量 */
//构造函数
public Objects(int num, string Name, int count)
{
number = num;
name = Name;
counter = count;
}
public int Number
{
get
{
return number;
}
set
{
number = value;
}
}
public string Name
{
get
{
return name;
}
set
{
name = value;
}
}
public int Counter
{
get
{
return counter;
}
set
{
counter = value;
}
}
}链表节点
// 结点类
public class ListNode
{
public ListNode(Objects bugs)
{
goods = bugs;
}
/**/
/// <summary>
/// 前一个
/// </summary>
public ListNode Previous;
/**/
/// <summary>
/// 后一个
/// </summary>
public ListNode Next;
public ListNode next
{
get
{
return Next;
}
set
{
Next = value;
}
}
/**/
/// <summary>
/// 值
/// </summary>
public Objects goods;
public Objects Goods
{
get
{
return goods;
}
set
{
goods = value;
}
}
}链表结构类
初始化构造函数
public Clists()
{
//构造函数
//初始化
ListCountValue = 0;
Head = null;
Tail = null;
}
/**/
/// <summary>
/// 表名
/// </summary>
private string clistname = "";
public string ClistName
{
get
{
return clistname;
}
set
{
clistname = value;
}
}
/**/
/// <summary>
/// 头指针
/// </summary>
private ListNode Head;
/**/
/// <summary>
/// 尾指针
/// </summary>
private ListNode Tail;
/**/
/// <summary>
/// 当前指针
/// </summary>
private ListNode Current;
public ListNode current
{
get
{
return Current;
}
set
{
Current = value;
}
}
/**/
/// <summary>
/// 链表数据的个数
/// </summary>
private int ListCountValue;链表尾部添加数据
/// <summary>
/// 尾部添加数据
/// </summary>
public void Append(Objects DataValue)
{
ListNode NewNode = new ListNode(DataValue);
if (IsNull())
//如果头指针为空
{
Head = NewNode;
Tail = NewNode;
}
else
{
Tail.Next = NewNode;
NewNode.Previous = Tail;
Tail = NewNode;
}
Current = NewNode;
//链表数据个数加一
ListCountValue += 1;
}删除当前数据
/// <summary>
/// 删除当前的数据
/// </summary>
public void Delete()
{
//若为空链表
if (!IsNull())
{
//若删除头
if (IsBof())
{
Head = Current.Next;
Current = Head;
ListCountValue -= 1;
return;
}
//若删除尾
if (IsEof())
{
Tail = Current.Previous;
Tail.next = null;
Current = Tail;
ListCountValue -= 1;
return;
}
//若删除中间数据
Current.Previous.Next = Current.Next;
Current = Current.Previous;
ListCountValue -= 1;
return;
}
}
/**/
/// <summary>
/// 向后移动一个数据
/// </summary>
public void MoveNext()
{
if (!IsEof()) Current = Current.Next;
}
/**/
/// <summary>
/// 向前移动一个数据
/// </summary>
public void MovePrevious()
{
if (!IsBof()) Current = Current.Previous;
}
/**/
/// <summary>
/// 移动到第一个数据
/// </summary>
public void MoveFrist()
{
Current = Head;
}
/**/
/// <summary>
/// 移动到最后一个数据
/// </summary>
public void MoveLast()
{
Current = Tail;
}
/**/
/// <summary>
/// 判断是否为空链表
/// </summary>
public bool IsNull()
{
if (ListCountValue == 0)
return true;
else
return false;
}
/**/
/// <summary>
/// 判断是否为到达尾部
/// </summary>
public bool IsEof()
{
if (Current == Tail)
return true;
else
return false;
}
/**/
/// <summary>
/// 判断是否为到达头部
/// </summary>
public bool IsBof()
{
if (Current == Head)
return true;
else
return false;
}
public Objects GetCurrentValue()
{
return Current.goods;
}
/**/
/// <summary>
/// 取得链表的数据个数
/// </summary>
public int ListCount
{
get
{
return ListCountValue;
}
}清空链表
/// <summary>
/// 清空链表
/// </summary>
public void Clear()
{
MoveFrist();
while (!IsNull())
{
//若不为空链表,从尾部删除
Delete();
}
}插入链表
/// <summary>
/// 在当前位置前插入数据
/// </summary>
public void Insert(Objects DataValue)
{
ListNode NewNode = new ListNode(DataValue);
if (IsNull())
{
//为空表，则添加
Append(DataValue);
return;
}
if (IsBof())
{
//为头部插入
NewNode.Next = Head;
Head.Previous = NewNode;
Head = NewNode;
Current = Head;
ListCountValue += 1;
return;
}
//中间插入
NewNode.Next = Current;
NewNode.Previous = Current.Previous;
Current.Previous.Next = NewNode;
Current.Previous = NewNode;
Current = NewNode;
ListCountValue += 1;
}升序插入
/// <summary>
/// 进行升序插入
/// </summary>
public void InsertAscending(Objects InsertValue)
{
//参数：InsertValue 插入的数据
//为空链表
if (IsNull())
{
//添加
Append(InsertValue);
return;
}
//移动到头
MoveFrist();
if ((InsertValue.Number < GetCurrentValue().Number))
{
//满足条件，则插入，退出
Insert(InsertValue);
return;
}
while (true)
{
if (InsertValue.Number < GetCurrentValue().Number)
{
//满族条件，则插入，退出
Insert(InsertValue);
break;
}
if (IsEof())
{
//尾部添加
Append(InsertValue);
break;
}
//移动到下一个指针
MoveNext();
}
}降序插入
/// <summary>
/// 进行降序插入
/// </summary>
/**/
/*货物入库*/
public void InsertUnAscending(Objects InsertValue)
{
//参数：InsertValue 插入的数据
//为空链表
if (IsNull())
{
//添加
Append(InsertValue);
return;
}
//移动到头
MoveFrist();
if (InsertValue.Number > GetCurrentValue().Number)
{
//满足条件，则插入，退出
Insert(InsertValue);
return;
}
while (true)
{
if (InsertValue.Number > GetCurrentValue().Number)
{
//满足条件，则插入，退出
Insert(InsertValue);
break;
}
if (IsEof())
{
//尾部添加
Append(InsertValue);
break;
}
//移动到下一个指针
MoveNext();
}
}链表应用例子
//根据名字查询货物
public Objects FindObjects(string name)
{
ListNode lnode = Head;
if (IsNull())
{
return null;
}
else if (IsEof())
{
return null;
}
else
while (lnode.goods.Name != name)
{
if (lnode.Next == null)
{
Current = lnode;
return null;
}
lnode = lnode.Next;
}
Current = lnode;
return lnode.goods;
}
//根据编号查询货物
public Objects FindObjects(int number)
{
ListNode lnode = Head;
if (IsNull())
{
return null;
}
else if (IsEof())
{
return null;
}
else
while (lnode.goods.Number != number)
{
if (lnode.Next == null)
{
Current = lnode;
return null;
}
lnode = lnode.Next;
}
Current = lnode;
return lnode.goods;
}
/**/
/*货物出库*/
//根据名字删除货物
public Objects DeleteObjects(string name)
{
Objects bugs;
bugs = FindObjects(name);
Delete();
return bugs;
}
//根据编号删除货物
public Objects DeleteObjects(int number)
{
Objects bugs;
bugs = FindObjects(number);
Delete();
return bugs;
}本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2022-07-10，如有侵权请联系 cloudcommunity@tencent.com 删除
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