C ++ | Виртуальные функции | Вопрос 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;

}