GameLobby

#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;        //(ponteiro)aponta para o proximo jogador da lista
};

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;
};

Lobby::Lobby():
    m_pHead(0)
{}

Lobby::~Lobby(){
    Clear();
}

void Lobby::AddPlayer(){
    //cria um novo jogador
    cout << "Entre um nome de um jogador: ";
    string name;
    cin >> name;
    Player* pNewPlayer = new Player(name);

    //se a lista tiver vazia, faça o novo jogador ser a cabeça
    if(m_pHead == 0){
        m_pHead = pNewPlayer;
    }else{  //ou, ache o final da fila e add ele
        Player* pIter = m_pHead;
        while(pIter -> GetNext() != 0){
            pIter = pIter -> GetNext();
        }
        pIter -> SetNext(pNewPlayer);
    }
}

void Lobby::RemovePlayer(){
    if(m_pHead == 0){
        cout << "O Lobby esta vazio ninguém pra sair!\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 << "\nAqui esta o Lobby: \n";
    if(pIter == 0){
        os << "O Lobby esta vazio.\n";
    }else{
        while(pIter != 0){
            os << pIter -> GetName() << endl;
            pIter = pIter -> GetName();
        }
    }
    return os;
}

int main(){
    Lobby myLobby;
    int choice;

    do{
        cout << myLobby;
        cout << "\nGAME LOBBY\n";
        cout << "0 - Saia do programa.\n";
        cout << "1 - Adicione o jogador ao lobby.\n";
        cout << "2 - Retire um jogador do lobby.\n";
        cout << "3 - Limpar lobby.\n";
        cout << endl << "Entre a escolha: ";
        cin >> choice;

        switch(choice){
            case 0: cout << "Ate mais.\n"; break;
            case 1: myLobby.AddPlayer(); break;
            case 2: myLobby.RemovePlayer(); break;
            case 3: myLobby.Clear(); break;
            default: cout << "Isso nao foi uma escolha valida.\n";
        }
    }while(choice != 0);

    return 0;
}