C++ | Funciones virtuales | Pregunta 7

#include<iostream>
using namespace std;
  
class Base
{
public:
    virtual void show() = 0;
};
  
class Derived: public Base
{
public:
    void show() { cout<<"In Derived \n"; }
};
  
int main(void)
{
    Derived d;
    Base &br = d;
    br.show();
    return 0;
}