#include <iostream>
#include <string>
using namespace std;
///////////////////////////////////////////
class Pet                    // Abstract class
{
public:
    Pet(string name);        // constructor
    virtual void goes()=0;   // pure virtual function, polymorphic 
    virtual void likes()=0;  // pure virtual function              
    string I();
private:
    string my_name;
};

Pet::Pet(string name) :my_name(name) {}

string Pet::I()
{   return my_name;}

///////////////////////////////////////////
class Dog: public Pet 
{
public:
    Dog(string name);        // constructor
    void goes();
    void likes();
private:
    string my_name;
};

Dog::Dog(string name) :Pet(name) {}

void Dog::goes()  
{   cout << I() << " goes Woof!! Woof!!\n"; }

void Dog::likes()
{   cout << I() << " likes bone.\n";}

///////////////////////////////////////////
class Cat: public Pet 
{
public:
    Cat(string name);        // constructor
    void goes();
    void likes();
private:
    string my_name;
};

Cat::Cat(string name) :Pet(name) {}

void Cat::goes()
{   cout << I() << " goes Meow!! Meow!!\n";}

void Cat::likes()
{   cout << I() << " likes fish.\n";}

int main()
{
//  Pet lulu("Lulu");        // Can't be used. 
    Dog lucky("Lucky");
    Cat mimi("Mimi");
//  lulu.goes();  lulu.likes();     cout << endl;
    lucky.goes(); lucky.likes();    cout << endl;
    mimi.goes();  mimi.likes();     cout << "\n\n";
    return 0;
}