Herança - Virtual - C++

#include
using namespace std;

class Base {
public:
virtual void show () = 0;
};

class D_Class: public Base {
public:
virtual void show () { cout << " D_Class \n"; }
};


class D_Class2: public Base {
public:
virtual void show () { cout << " D_class2 \n"; }
};


int main()
{

D_Class b;
D_Class2 c;

b.show();
c.show();


cin.get();
return 0;
}