Define a class called Rational for rational numbers. A
rational number is a number that can be represented as the quotient
of two integers. For example, /2, 3/4, 64/2, and so forth are all
rational numbers.Represent rational
numbers as two private values of type int, numfor the numerator and den for the denominator. The class
has a default constructor with default values (num = 0,den = 1), a copy constructor, an assignment operator and
three friend functions for operator overloading...