C在可以从派生类访问的抽象基类中存储类指针？

我想在我的抽象Entity类中存储一个指向主Game类的指针 .

Entity.h

#include "Game.h"

class Entity
{
public:
    Entity(Game* game);
    ~Entity(void);

    virtual void Draw(float dt) = 0;
    virtual void Update(float dt) = 0;          // '= 0' means pure virtual function (like 'abstract' in C#)

protected:
    Game* m_game;                               // Missing type specifier error C4430
};

Entity.cpp

#include "Entity.h"

Entity::Entity(Game* game)
{
    m_game = game;
}

Entity::~Entity(void)
{

}

然后我应该能够实例化一个派生类，并将Game类引用传递给构造函数，以便将它传递给存储它的基类：

Boundary.h

#include "Entity.h"

class Boundary : public Entity
{
public:
    Boundary(Game* game);
    ~Boundary(void);

    // Override pure virtual functions
    void Draw(float dt);
    void Update(float dt);
};

然后，Boundary构造函数可以使用引用的Game类将其自身添加到列表中：

#include "Boundary.h"

Boundary::Boundary(Game* game) : Entity(game)
{
    // Add entity to the main entity list
    game->m_entities->push_back(*this);
}

Boundary::~Boundary(void)
{
}

void Boundary::Draw(float dt)
{
    // Call the base class as follows (C# equivalent: 'base.Draw(dt)')
    //Entity::Draw(dt);
}

void Boundary::Update(float dt)
{

}

这导致3种问题：

game->m_entities->push_back(*this);

错误C2663：'std :: list <_Ty，_Ax> :: push_back'：2个重载没有'this'指针的合法转换

Game* m_game; 在Entity.h中

错误C4430：缺少类型说明符 - 假定为int

在Game.h中 list<Entity>* m_entities;

错误C2065：'实体'：未声明的标识符

Entity(Game* game); 在Entity.h中

错误C2061：语法错误：标识符'游戏'

我想要实现的C＃相当于：

public abstract class Entity
{
    protected Game game;

    public abstract void Draw(float dt);
    public abstract void Update(float dt);
}

public class Boundary : Entity
{
    public Boundary(Game game)
    {
        this.game = game;

        game.Entities.Add(this);
    }

    public override void Draw(float dt)
    {

    }

    public override void Update(float dt)
    {

    }
}

我哪里出错了？

编辑：

Game.h

#include "btBulletDynamicsCommon.h"
//#include "LinearMath\btQuaternion.h"
#include <list>

using namespace std;        // Required for list

class Entity;               // Forward declaration

class Game
{
public:
    list<Entity>* m_entities;

    Game(void);
    ~Game(void);

    void init();
    void draw(float dt);
    void loadContent();
    void update(float dt);

private:
    class btDefaultCollisionConfiguration* m_collisionConfiguration;
    class btCollisionDispatcher* m_dispatcher;
    class btDiscreteDynamicsWorld* m_dynamicsWorld;
    class btBroadphaseInterface* m_overlappingPairCache;
    class btSequentialImpulseConstraintSolver* m_solver;

    void exitPhysics();
    void initPhysics();
};

编辑2：

我现在唯一的问题是试图在构造函数中引用游戏：

Boundary::Boundary(Game *game) 
    : Entity(game)                  // Initialise base
{
    // Add entity to the main entity list
    game->m_entities->push_back(*this);      // ERROR
}

基类遇到同样的问题

Entity::Entity(Game* game) 
    : m_game(game)                  // Initialise members
{
    m_game->m_entities->push_back(this);     // ERROR here too
}