c++ - 访问数组中的派生类的问题

Question

class BaseObj
{
public:
    int position;
};

class EnemyObj: public BaseObj
{
public:
    int quantity;
};

class PlayerObj: public BaseObj
{
public:
    int lives;
};

int main()
{
    BaseObj* myObjs[3];

    BaseObj* b = new BaseObj();
    b->position = 1;
    myObjs[0] = b;

    EnemyObj* e = new EnemyObj();
    e->position = 2;
    e->quantity = 5;
    myObjs[1] = e;

    PlayerObj* p = new PlayerObj();
    p->position = 3;
    p->lives = 2;
    myObjs[2] = p;

    myObjs[2]->lives = 2;  // error is here
    return 0;
}

我的问题是我想要一个包含我所有游戏对象的数组，这样我就可以把它们放在一起，但是当我尝试访问 myObjs[2]->生命 我无法这样做。这是我得到的错误:

error C2039: 'lives' : is not a member of 'BaseObj'

Answer 1

myObjs is a pointer to base so it can access only base members