#ifndef _HELLOWORLD_HPP
#define _HELLOWORLD_HPP

#include <iostream>

#include <extras/interfaces.hpp>

interface HelloWorldInterface
{
  virtual std::string say_hello() const pure;
};

class HelloWorld implements HelloWorldInterface
{
public:
  virtual std::string say_hello() const;
};

#endif// _HELLOWORLD_HPP
