/*
 * 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.
 */

#include "LinearSpec.h"
#include "Summand.h"
#include "Variable.h"


Summand::Summand(Summand* summand)
        :
        fCoeff(summand->Coeff()),
        fVar(summand->Var())
{
}


Summand::Summand(double coeff, Variable* var)
        :
        fCoeff(coeff),
        fVar(var)
{
}


Summand::~Summand()
{

}


/**
 * Gets the summmand's coefficient.
 * 
 * @return the summand's coefficient
 */
double
Summand::Coeff()
{
        return fCoeff;
}


/**
 * Sets the summmand's coefficient.
 * 
 * @param coeff coefficient
 */
void
Summand::SetCoeff(double coeff)
{
        fCoeff = coeff;
}


/**
 * Gets the summand's variable.
 * 
 * @return the summand's variable
 */
Variable*
Summand::Var()
{
        return fVar;
}


/**
 * Sets the summand's variable.
 * 
 * @param var   variable
 */
void
Summand::SetVar(Variable* var)
{
        fVar = var;
}


int32
Summand::VariableIndex()
{
        return fVar->Index();
}