Как добавить элемент в очередь, используя указатель на последний элемент?

//Game Lobby
//Simulates a game lobby where players wait
 
#include <iostream>
#include <string>
 
using namespace std;
 
class Player
{
public:
    Player(const string& name = "");
    string GetName() const;
    Player* GetNext() const;
    void SetNext(Player* next);
 
private:
    string m_Name;
    Player* m_pNext;  //Pointer to next player in list
};
 
Player::Player(const string& name) :
m_Name(name),
m_pNext(0)
{}
 
string Player::GetName() const
{
    return m_Name;
}
 
Player* Player::GetNext() const
{
    return m_pNext;
}
 
void Player::SetNext(Player* next)
{
    m_pNext = next;
}
 
class Lobby
{
    friend ostream& operator<<(ostream& os, const Lobby& aLobby);
 
public:
    Lobby();
    ~Lobby();
    void AddPlayer();
    void RemovePlayer();
    void Clear();
 
private:
    Player* m_pHead;
    Player* m_pTail;
};
 
Lobby::Lobby() :
m_pHead(0)
{}
 
Lobby::~Lobby()
{
    Clear();
}
 
void Lobby::AddPlayer()
{
    //create a new player node
    cout << "Please enter the name of the new player: ";
    string name;
    cin >> name;
    Player* pNewPlayer = new Player(name);
 
    //if list is empty, make head of list this new player
    if (m_pHead == 0)
    {
        m_pHead = pNewPlayer;
    }
    //otherwise find the end of the list and add the player there
    else 
    {
        Player* pEnd = m_pTail;
        if (pEnd->GetNext() == 0)
        {
            pEnd->SetNext(pNewPlayer);
        }
    }
 
}
 
void Lobby::RemovePlayer()
{
    if (m_pHead == 0)
    {
        cout << "The game lobby is empty.  No one to remove!\n";
    }
    else
    {
        Player* pTemp = m_pHead;
        m_pHead = m_pHead->GetNext();
        delete pTemp;
    }
}
 
void Lobby::Clear()
{
    while (m_pHead != 0)
    {
        RemovePlayer();
    }
}
 
ostream& operator<<(ostream& os, const Lobby& aLobby)
{
    Player* pIter = aLobby.m_pHead;
 
    os << "\nHere's who's in the game lobby:\n";
    if (pIter == 0)
    {
        os << "The lobby is empty.\n";
    }
    else
    {
        while (pIter != 0)
        {
            os << pIter->GetName() << endl;
            pIter = pIter->GetNext();
        }
    }
 
    return os;
}
 
int main()
{
    Lobby myLobby;
    int choice;
 
    do
    {
        cout << myLobby;
        cout << "\nGAME LOBBY\n";
        cout << "0 - Exit the program.\n";
        cout << "1 - Add a player to the lobby.\n";
        cout << "2 - Remove a player from the lobby.\n";
        cout << "3 - Clear the lobby.\n";
        cout << endl << "Enter choice: ";
        cin >> choice;
 
        switch (choice)
        {
        case 0: cout << "Good-bye.\n"; break;
        case 1: myLobby.AddPlayer(); break;
        case 2: myLobby.RemovePlayer(); break;
        case 3: myLobby.Clear(); break;
        default: cout << "That was not a valid choice.\n";
        }
    } while (choice != 0);
 
    return 0;
}

    Player* pNewPlayer = new Player(name);
 
    if (m_pHead == 0)
    {
        m_pHead = pNewPlayer;
    }
    else
    {
        m_pTail->SetNext(pNewPlayer);
    }
    m_pTail = pNewPlayer;