Re: Does object have function?

This would work:

class Base {
public:
   virtual ~Base() {}
};

class Fooer {
public:
   virtual void foo() = 0;
};

class DerivedOne : public Base, public Fooer {
public:
   void foo() { cout << "DerivedOne::foo()\n"; }
};

class DerivedTwo : public Base, public Fooer {
public:
   void foo() { cout << "DerivedTwo::foo()\n"; }
};

class DerivedThree: public Base {
};

int main() {
   Base* bps[3];
   bps[0] = new DerivedOne();
   bps[1] = new DerivedTwo();
   bps[2] = new DerivedThree();

   for ( int i = 0; i < 3; ++i ) {
      Fooer* thisOne = dynamic_cast<Fooer*>( bps[i] );
      if ( thisOne )
         thisOne->foo();
   }
}