#include <iostream>

using namespace std;

class Animal{
public:
    void move(){cout << "I'm moving\n";}
};

class Dog: public Animal{
public:
    void move(){Animal::move();}
    void move(int i){cout << "I'm trotting happily!\n";}
};
class Cat: public Animal{
public:
    void move(){cout << "I'm prowling.\n";}
};

int main(){

    Animal a;
    a.move();
    Dog d;
    d.move();
    d.move(5);
    return 0;
}