#include <iostream>
using namespace std;

class Iface {
public:
  void stop() { cout << "Stop" << endl; }
  void run() { cout << "Run" << endl; }
  void resume() { cout << "Resume" << endl; }
  void suspend() { cout << "Suspend" << endl; }
};

typedef void ( Iface::*Operation ) ();

class Worker 
{
public:
  Worker( Iface* i ) : iface(i) {}
  void doIt( Operation op ) { (iface->*op) (); }
private:
  Iface* iface;
};

void main()
{
  Iface* i = new Iface();
  Worker w( i );
  w.doIt( &Iface::run );
  w.doIt( &Iface::stop );
  Operation op = &Iface::resume;
  w.doIt( op );
  delete i;
}