link.h

#pragma once
#ifndef _LINK_H
#define _LINK_H
#include "node.h"
class Link
{
public:
    Link();
    ~Link();
    void ClearLink();
    bool LinkEmpty()const;
    int  LinkLength()const;
    bool GetElem(int i,Node *pNode)const;
    int  LocateElem(Node *pNode)const;
    bool PriorElem(Node *pCurrentNode, Node *pPreNode)const;
    bool NextElem(Node *pCurrentNode, Node *pNextNode)const;
    void LinkTraverse()const;
    bool EnLink(int i, Node *pNode);
    bool DeLink(int i, Node *pNode);
    bool LinkInHead(Node *pNode);
    bool LinkInTail(Node *pNode);
private:
    Node *m_pLink;
    int m_iLength;
};

#endif 

link.cpp

#include "link.h"
#include <iostream>
using namespace std;

Link::Link()
{
    m_pLink = new Node;
    m_pLink->data = 0;
    m_pLink->next = NULL;
    m_iLength = 0;//头节点
}

Link::~Link()
{
    ClearLink();
    delete m_pLink;
    m_pLink = NULL;
}
void Link::ClearLink()
{
    Node *currentNode = m_pLink->next;
    while (currentNode != NULL)
    {
        Node *temp = currentNode->next;
        delete currentNode;
        currentNode = temp;
    }
    m_pLink->data = NULL;
}
bool Link::LinkEmpty()const
{
    return m_iLength == 0 ? true : false;
}
int  Link::LinkLength()const
{
    return m_iLength;
}

bool Link::GetElem(int i, Node *pNode)const
{
    if (i < 0 || i >= m_iLength)
    {
        return false;
    }
    Node *currentNode = m_pLink;
    for (int k = 0; k <= i; k++)
    {
        currentNode = currentNode->next;
    }
    pNode->data = currentNode->data;
    return true;
}
int  Link::LocateElem(Node *pNode)const
{
    Node *currentNode = m_pLink;
    int count = 0;
    while (currentNode->next != NULL)
    {
        currentNode = currentNode->next;
        if (currentNode->data == pNode->data)return count;
        count++;
    }
    return -1;
}
bool Link::PriorElem(Node *pCurrentNode, Node *pPreNode)const
{
    Node *currentNode = m_pLink;
    Node *tempNode = NULL;
    while (currentNode->next != NULL)
    {
        tempNode = currentNode;
        currentNode = currentNode->next;
        if (currentNode->data == pCurrentNode->data)
        {
            if (tempNode == m_pLink) return false;
            pPreNode->data = tempNode->data;
            return true;
        }
    }
    return false;
}
bool Link::NextElem(Node *pCurrentNode, Node *pNextNode)const
{
    Node *currentNode = m_pLink;
    while (currentNode->next != NULL)
    {
        currentNode = currentNode->next;
        if (currentNode->data == pCurrentNode->data)
        {
            if (currentNode->next == NULL) return false;
            pNextNode->data = currentNode->next->data;
            return true;
        }
    }
    return false;
}
void Link::LinkTraverse()const
{
    Node *currentNode = m_pLink;
    while (currentNode->next != NULL)
    {
        currentNode = currentNode->next;
        currentNode->printNode();
    }
}
bool Link::EnLink(int i, Node *pNode)
{
    if (i < 0 || i > m_iLength)
    {
        return false;
    }
    Node *currentNode = m_pLink;
    for (int k = 0; k < i; k++)
        currentNode = currentNode->next;
    Node *newNode = new Node;
    if (newNode == NULL) return false;
    newNode->data = pNode->data;
    newNode->next = currentNode->next;
    currentNode->next = newNode;
    m_iLength++;
    return true;
}

bool Link::DeLink(int i, Node *pNode)
{
    if (i < 0 || i >= m_iLength)
    {
        return false;
    }
    Node *currentNode = m_pLink;
    Node *currentNodeBefore = NULL;
    for (int k = 0; k <= i; k++)
    {
        currentNodeBefore = currentNode;
        currentNode = currentNode->next;
    }
    currentNodeBefore->next = currentNode->next;
    pNode->data = currentNode->data;
    delete currentNode;
    currentNode = NULL;
    m_iLength--;
    return true;
}
bool Link::LinkInHead(Node *pNode)
{
    Node *temp = m_pLink->next;
    Node *newNode = new Node;
    if (newNode == NULL) return false;
    newNode->data = pNode->data;
    m_pLink->next = newNode;
    newNode->next = temp;
    m_iLength++;
    return true;
}
bool Link::LinkInTail(Node *pNode)
{
    Node *currentNode = m_pLink;
    while (currentNode->next != NULL)
    {
        currentNode = currentNode->next;
    }
    Node *newNode = new Node;
    if (newNode == NULL)
    {
        return false;
    }
    newNode->data = pNode->data;
    newNode->next = NULL;
    currentNode->next = newNode;
    m_iLength++;
    return true;
}

node.h/cpp

#pragma once
#ifndef _NODE_H
#define _NODE_H
class Node
{
public:
    int data;
    Node *next;
    void printNode();
};

#endif

#pragma once
#ifndef _NODE_H
#define _NODE_H
class Node
{
public:
    int data;
    Node *next;
    void printNode();
};

#endif

main

#include <iostream>
#include <cstdlib>
#include "link.h"
using namespace std;
int main(void)
{
    Link *p = new Link;
    Node node1,node2;
    node1.data = 8;
    node2.data = 8;
    p->LinkInHead(&node1);
    p->LinkInHead(&node2);
    p->LinkTraverse();
    delete p;
    p = NULL;//Look Out！
    system("pause");
    return 0;
}