自定义list

//思路分析: 定一个链表类,成员有 (节点,迭代器)

 

 

#include <iostream>

using namespace std;

//节点

template<typename U>

class Node

{

  public:

    Node(){pNext == NULL;}

    Node(U data):m_data(data){pNext = NULL;}

    U m_data;

    Node<U>* pNext;

};

//list  底层是链表

template <typename U>

class Mylist

{

public:

    // Mylist<int>::Myiterator iter;

    //迭代  底层是一个指针  ++ -- *

    struct Myiterator

    {

        Myiterator(Node<U> *node = NULL)

        {

            pNode = node;

        }

        Myiterator &operator++(int)

        {

            pNode= pNode->pNext;

            return *this;

        }

        bool operator !=(const Myiterator &other)

        {

            return pNode!=other.pNode;

        }

        U operator *()

        {

            return pNode->m_data;

        }

         Node<U> *pNode;

    };

    //  list<int> list; list.begin();返回的是迭代器

    //成员函数

    Myiterator begin()

    {

        Myiterator iter(m_pfrist);

        return iter;

    }

    Myiterator end()

    {

       Myiterator iter(NULL);

        return iter;

    }

     Mylist():m_ilen(0){m_pfrist =NULL;}

    void insert(U data);

    void display();

private:

    int m_ilen;

    //产生对象需要加<U>

    Node<U> *m_pfrist;

};

//插入

template<typename U>

void Mylist<U>::insert(U data)

{

    Node<U>* node= new Node<U>(data);

    if(NULL == m_pfrist)

    {

        m_pfrist=node;

    }else{

        node->pNext = m_pfrist;

        m_pfrist = node;

    }

m_ilen++;

}

//打印

template<typename U>

void Mylist<U>::display()

{

    Node<U> *node= m_pfrist;

    while(node != NULL)

    {

        cout<<node->m_data<<endl;

        node = node->pNext;

    }

}

struct STU

{

    STU(const string name="STU",float score=0.0): m_strName(name),m_fscore(score){}

    string m_strName;

    float m_fscore;

};

ostream& operator<<(ostream &os,const STU stu)

{

    os<<stu.m_strName<<" "<<stu.m_fscore<<endl;

    return os;

}

int main()

{

    Mylist<STU> stull;

   // ll.insert(88);

    stull.insert(STU("JACK",88.99));

    stull.insert(STU("ROSE",88.99));

    stull.insert(STU("Jim",33.99));

    stull.display();

    Mylist<STU>::Myiterator iter;

    iter = stull.begin();

    for(;iter!=stull.end();iter++)

    {

        cout<<*iter<<endl;

    }

}

转载于:https://www.cnblogs.com/countryboy666/p/10943318.html