这个题文件给了一大堆，其实最关键的只有两个 Listing.h及Group.h

 class Listing and class Group

题目总的来说是比较好的，可惜我运行不成功，所以在此只好把要做的事情做好

先看

Class Listing

Class Listing models a collection of advertisements. This class contains a private data member of type vector<Advertisement*>. This vector stores pointers to Advertisement objects.

Notice from the declaration of class Listing that the keyword typedef has been used to create alternate names for types vector<Advertisement*> and vector<Advertisement*>::iterator. Use these alternate names throughout the auction project.

• virtual void add(Advertisement* ptr);

Adds the Advertisement pointer given by the parameter to the vector objects.

• virtual iterator begin();

This returns an iterator to the first Advertisement* in vector objects.

• virtual iterator end();

This returns an iterator to the last Advertisement* in vector objects.

• virtual Advertisement* operator[](const int& number);

This returns the Advertisement pointer whose number equals the parameter number. Note, this is not the same as returning the pointer that exists and at index number. 

#ifndef LISTING_H#define LISTING_H#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include "Advertisement.h"using namespace std;class Listing;class Listing {protected:    typedef vector
          
            Container;public: typedef Container::iterator iterator;protected: Container objects;public: virtual Advertisement* operator[](const int& number); virtual ~Listing() {}; virtual void add(Advertisement* ptr); virtual iterator begin(); virtual iterator end();};#endif
          
         
        
       
      
     

有了上面英文的说明我们可以实现Listing的方法

Listing.cpp

#include "Listing.h"#include 
     
      #include 
      
       using namespace std;/* * This returns the Advertisement pointer whose number equals the parameter number. * Note, this is not the same as returning the pointer that exists and at index number. */Advertisement* Listing::operator[](const int& number) {    Listing::iterator it;    for (it = this->begin(); it != this->end(); it++) {        if ((*it)->getNumber() == number) {            return *it;        }    }    return NULL;}//Adds the Advertisement pointer given by the parameter to the vector objects.void Listing::add(Advertisement* ptr) {    objects.push_back (ptr);}//This returns an iterator to the first Advertisement* in vector objectsListing::iterator Listing::begin() {    return objects.begin();}//This returns an iterator to the last Advertisement* in vector objects.Listing::iterator Listing::end() {    return objects.end();}
      
     

 

Class Group

Class Group models a collection of clients. This class contains a private data member of type vector<Client*>. This vector stores pointers to Client objects.

As in class Listing, the declaration of class Client uses the keyword typedef to create alternate names for types vector<Client*> and vector<Client*>::iterator. Use these alternate names throughout the auction project.

• virtual void add(Client* ptr);

Adds the Client pointer given by the parameter to the vector objects.

• virtual iterator begin();

This returns an iterator to the first Client* in vector objects.

• virtual iterator end();

This returns an iterator to the last Client* in vector objects.

• virtual Client* operator[](const string& email);

This returns the Client pointer whose object's email equals the parameter email. 

#ifndef GROUP_H#define GROUP_H#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include "Client.h"using namespace std;class Group;class Group {protected:    typedef vector
          
            Container;public: typedef Container::iterator iterator;protected: Container objects;public: Client *operator[](const string& email); virtual ~Group() {}; virtual void add(Client* ptr); virtual iterator begin(); virtual iterator end();};#endif
          
         
        
       
      
     

 这样我们也能得到Group.cpp

#include "Group.h"#include 
     
      #include 
      
       using namespace std;//This returns the Client pointer whose object's email equals the parameter email. Client* Group::operator[](const string& email) {    Group::iterator it;    for (it = this->begin(); it != this->end(); it++) {        if ((*it)->getEmail() == email) {            return *it;        }    }    return NULL;}//Adds the Client pointer given by the parameter to the vector objects.void Group::add(Client* ptr) {    objects.push_back (ptr);}//This returns an iterator to the first Client* in vector objects.Group::iterator Group::begin() {    return objects.begin();}//This returns an iterator to the last Client* in vector objects.Group::iterator Group::end() {    return objects.end();}
      
     

这个题就算做完了

Submit only the following.

1. Listing.cpp - finished implementations of class Listing and Listing::iterator
2. Group.cpp - finished implementation of class Group and Group::iterator