Object-Oriented Design - Java Software Solutions: Foundations of Program Design - page 312

LISTING 7.3 continued

r4 = r1.add(r2);
r5 = r1.subtract(r2);
r6 = r1.multiply(r2);
r7 = r1.divide(r2);

System.out.println ("r1 + r2: " + r4);
System.out.println ("r1 - r2: " + r5);
System.out.println ("r1 * r2: " + r6);
System.out.println ("r1 / r2: " + r7);
}
}

OUTPUT

First rational number: 3/4
Second rational number: 1/3
r1 and r2 are NOT equal.
The reciprocal of r1 is: 4/3
r1 + r2: 13/12
r1 - r2: 5/12
r1 * r2: 1/4
r1 / r2: 9/4

The RationalNumber class is shown in Listing 7.4. Keep in mind as you exam-
ine this class that each object created from the RationalNumber class represents a
single rational number. The RationalNumber class contains various operations on
rational numbers, such as addition and subtraction.

LISTING 7.4

//********************************************************************
// RationalNumber.java Author: Lewis/Loftus
//
// Represents one rational number with a numerator and denominator.
//********************************************************************

public class RationalNumber
{
private int numerator, denominator;