#ifndef FORCE_H
#define FORCE_H

#ifndef PARAMETER_VALUE_H
#include "Parameter_value.h"
#endif

namespace MM
{
class Atom_group;

class Force : public Parameter_value
{
    Atom_group const &      group_;

public:
    explicit Force (Atom_group const & group) : group_(group) { }

    //void                    update ()=0;       //fix remove
    virtual int             size () const;
    virtual void            get (double *values) const ;
};

}//MM

#endif //FORCE_H
