/**
 * This class implements a rational number object,
 * and provides methods for performing arithmetic
 * on rational numbers.
 * @see java.lang.Math
 * @author Schultzie von Wienerschnitzel III
 * @version 3.14159
 */

public class Rational {
	/* instance variables */
	private int numer;		// numerator
	private int denom;		// denominator

	/* private utility method for setting data */
	private void set( int n, int d ) { numer = n; denom = d; }

	/**
	 * Default constructor creates the rational 0/1.
	 */
	public Rational( ) { set( 0, 1 ); }
	
	/**
	 * Standard constructor given numerator and denominator.
	 * @param n The numerator
	 * @param d The denominator
	 */
	public Rational( int n, int d ) { set( n, d ); }

	/**
	  * Multiplies two rational numbers and returns their the product.
	  * @param q The first operand.
	  * @param r The second operand.
	  * @return A reference to a newly created Rational with the sum.
	  */
	public static Rational multiply( Rational q, Rational r) 
		{ return new Rational( q.numer * r.numer, q.denom *r.denom ); }
}