Chapter 9, Problem 8E

Create a class Rational that represents a rational number. It should have private attributes for

• The numerator (an integer)
• The denominator (an integer)

and the following methods:

• Rational (numerator, denominator) — a constructor for a rational number.
• Accessor methods getNumerator and getDenominator and mutator methods setNumerator and setDenominator for the numerator and the denominator.

You should use an exception to guarantee that the denominator is never zero.