Указатель на виртуальный класс

class Food      
{
public:
    Food (int m) {Weight = m;};
    ~Food ();
    virtual int GetWeight() = 0;
protected:
    int Weight;
};
 
//Child class
class Drink: public Food
{
public:
    Drink (int v);
    virtual int GetWeight () {return Weight;};
private:
    int Capacity;
};

int main ()
{
    Food *Juice, Wodka;
        Food *Tea = new Drink (400);
        return 0;
}

Food *Juice, Wodka;

#include <string>
#include <iostream>
#include <map>
 
using namespace std;
 
//Basic class
class Food      
{
public:
    Food ();
    Food (int m) {Weight = m;};
    virtual ~Food();
    Food& operator= (Food& rhs);
    virtual int GetWeight() = 0;
protected:
    int Weight;
};
 
//Child class
class Drink:public Food
{
public:
    Drink ();
    Drink (int v);
    virtual ~Drink ();
    virtual int GetWeight () {return Weight;};
private:
    int Capacity;
};
 
//Child class
class Fruits:public Food
{
public:
    Fruits ();
    Fruits (int n);
    virtual ~Fruits ();
    virtual int GetWeight () {return Weight;};
private:
    int Number;
};
 
//Drink constructor
Drink::Drink (int v):Food(v)
{
    Capacity = v;
};
 
//Fruits constructor
Fruits::Fruits (int n):Food(n*150)
{
    Number = n;
};
 
//Food operator =
Food& Food::operator= (Food& rhs)
{
    if (&rhs == this)
        return *this;
    Weight = rhs.GetWeight;
    return *this;
};
 
typedef map <string, Food*> MyList;
 
int main ()
{
    Food *Juice, *Apple;
    MyList List;
    Juice = new Drink (500);
    Apple = new Fruits (4);
    return 0;
}

#include <string>
#include <iostream>
#include <map>
 
using namespace std;
 
//Basic class
class Food      
{
public:
    Food ();
    Food (int m) {Weight = m;};
    virtual ~Food();
    Food& operator= (Food& rhs);
    virtual int GetWeight() = 0;
protected:
    int Weight;
};
 
//Child class
class Drink:public Food
{
public:
    Drink ();
    Drink (int v);
    virtual ~Drink ();
    virtual int GetWeight () {return Weight;};
private:
    int Capacity;
};
 
//Child class
class Fruits:public Food
{
public:
    Fruits ();
    Fruits (int n);
    virtual ~Fruits ();
    virtual int GetWeight () {return Weight;};
private:
    int Number;
};
 
//Constructors
Food::Food ()
{};
 
Drink::Drink ()
{};
 
Fruits::Fruits ()
{};
 
//Destructors
Food::~Food ()
{};
 
Drink::~Drink ()
{};
 
Fruits::~Fruits ()
{};
 
//Drink constructor
Drink::Drink (int v):Food(v)
{
    Capacity = v;
};
 
//Fruits constructor
Fruits::Fruits (int n):Food(n*150)
{
    Number = n;
};
 
//Food operator =
Food& Food::operator= (Food& rhs)
{
    if (&rhs == this)
        return *this;
    Weight = rhs.GetWeight ();
    return *this;
};
 
typedef map <string, Food*> MyList;
 
int main ()
{
    Food *Juice, *Apple;
    MyList List;
    Juice = new Drink (500);
    Apple = new Fruits (4);
    return 0;
}

Compiling...
main.cpp
c:\program files\microsoft visual studio\vc98\include\xtree(120) : warning C4786: 'std::_Tree<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,
Food *>,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,Food *,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<Food *> >::_Kfn,std::less<std::basic_string<char,std::char_t
raits<char>,std::allocator<char> > >,std::allocator<Food *> >' : identifier was truncated to '255' characters in the debug information
        c:\program files\microsoft visual studio\vc98\include\map(46) : see reference to class template instantiation 'std::_Tree<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::pair<std::basic_string<char,std::char_traits<
char>,std::allocator<char> > const ,Food *>,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,Food *,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<Food *> >::_Kfn,std::les
s<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<Food *> >' being compiled
       ...
warning C4786: 'std::_Tree<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,Food *>,std::map<std::basic_string<char,std::char_traits<char>,std:
:allocator<char> >,Food *,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<Food *> >::_Kfn,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<Food *> >::_Red
bl' : identifier was truncated to '255' characters in the debug information
Linking...
 
Study.exe - 0 error(s), 77 warning(s)