Ошибка при создании обьекта класса

class Goods{
 
public:
 
    Goods(string, int );
 
};
 
class Buy{
 
private:
 
    Goods goods_in_storage("Storage.txt", 3); // error: expected identifier before string constant|
                                              // error: expected ',' or '...' before string constant|
public:
 
};

class Goods
{
public:
    Goods(std::string, int);
};
 
class Buy
{
private:
    Goods goods_in_storage = Goods("storage.txt", 3);
 
public:
    Buy () = default;
};

class Buy
{
private:
    Goods goods_in_storage;
 
public:
    Buy (): goods_in_storage("storage.txt", 3)
    {  }
};

class Goods{
 
public:
 
    Goods(std::string, int);
 
};

class Shop{
 
private:
 
    Goods goods_in_storage;
 
public:
 
    Shop(): goods_in_storage(".txt", 3) {}
 
};

class Storage : public Shop{
 
public:
 
    Storage(): Shop(): goods_in_storage("Storage.txt", characteristic_count) {}// ERROR
 
};

class Storage : public Shop {
 
public:
 
    Storage() : Shop() {}
 
};

class Shop {
 
private:
 
    Goods goods_in_storage;
 
public:
 
    Shop() : goods_in_storage(".txt", 3) {}
    Shop(std::string s, int v): goods_in_storage(s,v) {}
 
};
 
class Storage : public Shop {
 
public:
 
    Storage() : Shop("Storage.txt", 999) {}
 
};