#include <iostream>
  
class Mammal
{
public:
    void move() const { std::cout << "Mammal moves one step\n"; }
    void move(int distance) const 
        { std::cout << "Mammal moves " << distance <<" steps\n"; }
protected:
    int age;
    int weight;
};
  
class Dog : public Mammal
{
public:
    void move() const { std::cout << "Dog moves 5 steps\n"; }
}; // you may receive a warning that you are hiding a function!
  
int main()
{
    Mammal bigAnimal;
    Dog fido;
    bigAnimal.move();
    bigAnimal.move(2);
    fido.move();
    // fido.move(10);
    return 0;
}