C++链表类怎么封装

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1.CList.h

#ifndef CLIST_H#define CLIST_H class Cnode         //节点类{public:    CNode();    ~CNode();    void *data;     //数据域  节点数据的地址    CNode *pnext;   //指针域  保存下一个节点的地址protected:private:}; class CList         //链表类{public:    CList();    ~CList();    void addList(void *data);                  //在尾部添加节点    int getListCount();                        //获取节点的个数    int insertListByPos(int pos,void *data);   //根据pos插入节点    int deleteListByPos(int pos);              //删除节点    void *getNodeByPos(int pos);               //获取节点数据    void *freeList();                          //释放链表protected:private:    CNode *head;                               //链表头    int count;                                 //节点个数}; #endif

2.CList.cpp

#include"CList.h"#include<stdio.h>#include<cstring>//memset头文件 CNode::CNode(){    this->data = NULL;    this->pnext = NULL;} CNode::~CNode(){} CList::CList(){    this->head = new CNode;    this->count = 0;} CList::~CList(){} //在尾部添加节点void CList::addList(void *data){    CNode *tmp = this->head;    while(tmp->pnext!=NULL)    {        tmp = tmp->pnext;        }    CNode *newNode = new CNode;//创建新节点    tmp->pnext = newNode;    newNode->data = data;    ++(this->count);} //获取节点的个数int CList::getListCount(){    return this->count;} //根据pos插入节点int CList::insertListByPos(int pos,void *data){    int num = 0;    CNode* tmp = this->head;    while(tmp->pnext!=NULL)    {        count++;        tmp = tmp->pnext;        if(pos == count)        {            CNode* newNode = new CNode;  //新节点            memset(newNode,'\0',sizeof(CNode));            newNode->data = data;            newNode->pnext = tmp->pnext;            tmp->pnext = newNode;            return 1;        }    }    return 0;} //删除节点int CList::deleteListByPos(int pos){    int count = 0;    CNode* tmp = head->pnext,*pre = head;    while(tmp!=NULL)    {        count++;        if(count == pos)        {            pre->pnext = tmp->pnext;            //tmp数据域释放掉            delete tmp->data;            delete tmp;            return 1;        }        pre = pre->pnext;        tmp = tmp->pnext;    }    return -1;} //获取节点数据void* CList::getNodeByPos(int pos){    int count = 0;    CNode* tmp = head;    while(tmp->pnext!=NULL)    {        count++;        tmp = tmp->pnext;        if(pos == count)        {            return tmp->data;            }    }    return NULL;} //释放链表void* CList::freeList(){    CNode* tmp = head;    while(tmp!=NULL)    {        head = head->pnext;        delete tmp->data;        delete tmp;        tmp = head;        }    return this->head;}

3.main.cpp

计算总节点数：

#include<iOStream>using namespace std;#include"CTools.h"#include "CLabel.h"#include"CEdit.h"#include"CButton.h"#include"CtrBase.h"#include"CLogin.h"      //显示登录窗口#include"CIndexWin.h"   //管理员主界面窗口#include"CManagerWin.h" //经理主界面窗口#include"CWaiterWin.h"  //服务员主界面窗口#include<stdlib.h>#include"CList.h" int main(){    CLoginWin *login = new CLoginWin(12,5,30,20);    CIndexWin *index = new CIndexWin(3,3,25,23);    CManagerWin *manager = new CManagerWin(3,3,25,23);    CWaiterWin *waiter = new CWaiterWin(3,3,25,30);         CList *myList = new CList;    myList->addList(login);    myList->addList(index);    myList->addList(manager);    myList->addList(waiter);    cout<<myList->getListCount()<<endl;//4    return 0;}

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