C++实现链表基本操作

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LinkList.h
LinkList.cpp
main.cpp

LinkList.h代码如下

#include <iostream>  
#include <string>  
using namespace std;

struct Info
{
    string name;    //姓名  
    int id;     //学号  
    Info(string n,int d):name(n), id(d){}
};

struct Node
{
    Info val;
    Node *next;
    Node(Info x) :val(x), next(NULL){}
};

class LinkList
{
public:
    //构造函数  
    LinkList();

    void InsertHead(Info val);  //在链表头部插入结点 
    void Insert(Info val, int pos); //在链表pos位置插入结点 
    void InsertLast(Info val);  //在表尾插入结点 

    //删除结点  
    void Remove(Info val);
    //得到链表长度  
    int Length();
    //链表反序  
    void Reverse();
    //查找结点位置  
    int Find(Info val);
    //打印链表  
    void traverList();
    //析构函数  
    ~LinkList();
private:
    Node *head;
    int length;
};

LinkList.cpp代码如下

#include "linklist.h"  

using namespace std;

//构造函数  
LinkList::LinkList()
{
    head = NULL;
    length = 0;
}

//析构函数  
LinkList::~LinkList()
{
    Node *temp;
    for (int i = 0; i < length; i++)
    {
        temp = head;
        head = head->next;
        delete temp;
    }
}

//得到链表长度  
int LinkList::Length()
{
    return length;
}

//在链表头部插入结点  
void LinkList::InsertHead(Info val)
{
    Insert(val, 0);
}
void LinkList::InsertLast(Info val)
{
    Insert(val, length);
}

//在pos位置插入结点  
void LinkList::Insert(Info val, int pos)
{
    if (length + 1 < pos || pos < 0)
    {
        cout << "pos must be greater than zero or less than ListSize" << endl;
        return;
    }

    Node *temp = head;
    Node *node = new Node(val);//创建一个node
    if (pos == 0)
    {
        node->next = temp;
        head = node;
    }
    else
    {   //插入时非表头时
        for (int index = 1; temp != NULL && index < pos;index++)
        {
            temp = temp->next;
        }   
        node->next = temp->next;
        temp->next = node;
    }
    length++;
    return;
}

//删除结点  
void LinkList::Remove(Info val)
{
    int pos = Find(val);
    if (pos == -1)
    {
        cout << "Delete failed" << endl;
        return;
    }
    if (pos == 1)
    {
        head = head->next;
        length--;
        return;
    }
    int index = 2;
    Node *temp = head;
    while (index < pos)
        temp = temp->next;
    temp->next = temp->next->next;
    length--;
}

//查找结点位置  
int LinkList::Find(Info val)
{
    Node *temp = head;
    int index = 1;
    while (temp != NULL)
    {
        if (temp->val.name == val.name && temp->val.id == val.id)
            return index;
        temp = temp->next;
        index++;
    }
    return -1; //不存在返回-1  
}

//链表反序  
void LinkList::Reverse()
{
    if (head == NULL)
        return;
    Node *curNode = head, *nextNode = head->next, *temp;
    while (nextNode != NULL)
    {
        temp = nextNode->next;
        nextNode->next = curNode;
        curNode = nextNode;
        nextNode = temp;
    }
    head->next = NULL;
    head = curNode;
}

//打印链表  
void LinkList::traverList()
{
    if (head == NULL)
    {
        cout << "LinkList is empty" << endl;
        return;
    }
    Node *temp = head;
    while (temp != NULL)
    {
        cout << temp->val.name << "," << temp->val.id << endl;
        temp = temp->next;
    }
    cout << endl;
}

测试
main.cpp

// main.cpp : 测试链表功能。  
#include <iostream>  
#include <string>  
#include "linklist.h"  
using namespace std;

int main()
{
    LinkList head;
    Info val1("Kevin", 1), val2("Cathy", 2), val3("Lucy", 3), val4("Gravin",4);


    //测试插入功能  
    cout << "Insert test:" << endl;
    head.InsertHead(val1);
    head.InsertLast(val2);
    head.InsertLast(val3);
    head.InsertHead(val3);
    head.InsertLast(val4);

    head.traverList();

    //测试反序功能  
    cout << "reverse test:" << endl;
    head.Reverse();
    cout << "reversed linklist is:" << endl;
    head.traverList();

    //测试删除功能  
    cout << "remove test:" << endl;
    cout << "the length of linklist is:" << endl;
    cout << head.Length() << endl;
    head.Remove(val4);
    head.traverList();
    cout << "the length of linklist is:" << endl;
    cout << head.Length() << endl;
    head.Remove(val4);
    head.traverList();
    int pp;
    cin >> pp;
    return 0;
}