/*
 * Copyright 2007-2008, Christof Lutteroth, lutteroth@cs.auckland.ac.nz
 * Copyright 2007-2008, James Kim, jkim202@ec.auckland.ac.nz
 * Distributed under the terms of the MIT License.
 */
#ifndef SUMMAND_H
#define SUMMAND_H

#include <ObjectList.h>


namespace LinearProgramming {

class LinearSpec;
class Variable;

/**
 * A summand of a linear term.
 */
class Summand {
public:
                                                                Summand(Summand* summand);
                                                                Summand(double coeff, Variable* var);
                                                                ~Summand();

                        double                          Coeff();
                        void                            SetCoeff(double coeff);
                        Variable*                       Var();
                        void                            SetVar(Variable* var);

                        int32                           VariableIndex();
private:
                        double                          fCoeff;
                        Variable*                       fVar;
};

typedef BObjectList<Summand, true> SummandList;

}       // namespace LinearProgramming

using LinearProgramming::Summand;
using LinearProgramming::SummandList;


#endif  // OBJ_FUNCTION_SUMMAND_H