#ifndef MT1Q7_H
#define MT1Q7_H
///////////////////////////////////////////////////////////////
// MT1Q7.h - Operation on Elements                           //
//                                                           //
// Jim Fawcett, CSE687 - Object Oriented Design, Spring 2012 //
///////////////////////////////////////////////////////////////

#include <list>
#include <iostream>

template <typename T>
struct IFunctor
{
  virtual void operator()(T& t) = 0;
};

template <typename T>
class displayFunctor : public IFunctor<T>
{
public:
  void operator()(T& t) { std::cout << 2*t << " "; }
};

template <typename T>
class Container : public std::list<T>
{
public:
  void traverse(IFunctor<T>& funct)
  {
    iterator iter = begin();
    while(iter != end())
      funct(*iter++);
  }
};
#endif