//**************************************************************************//
//                                                                          //
// Copyright (c) 1997.                                                      //
//      Richard D. Irwin, Inc.                                              //
//                                                                          //
// This software may not be distributed further without permission from     //
// Richard D. Irwin, Inc.                                                   //
//                                                                          //
// This software is distributed WITHOUT ANY WARRANTY. No claims are made    //
// as to its functionality or purpose.                                      //
//                                                                          //
// Authors: James P. Cohoon and Jack W. Davidson                            //
// Date: 7/15/96                                                            //
// Version: 1.0b                                                            //
//                                                                          //
//**************************************************************************//

// rational.h: declaration of Rational ADT
#ifndef RATIONAL_H
#define RATIONAL_H

#include <iostream.h>

// Rational ADT: class description
class Rational {
	public: // member functions
		// constructors
		Rational();
		Rational(int numer, int denom = 1);
		// some arithmetic and stream facilitators
		Rational Add(const Rational &r) const;
		Rational Multiply(const Rational &r) const;
		void Insert(ostream &sout) const;
		void Extract(istream &sin);
	protected:
		// inspectors
		int Numerator() const;
		int Denominator() const;
		// mutators
		void SetNumerator(int numer);
		void SetDenominator(int denom);
	private:
		// data members
		int NumeratorValue;
		int DenominatorValue;
};

// Rational ADT: auxiliary operator description
Rational operator+(const Rational &r,
const Rational &s);
Rational operator*(const Rational &r,
const Rational &s);

ostream& operator<<(ostream &sout, const Rational &s);
istream& operator>>(istream &sin, Rational &r);

#endif