Circle Class (Easy)   Write a Circle class that has the following member variables: radius : a  double    The class should have the following member functions:    Default Constructor:  default constructor that sets radius to 0.0.  Constructor: accepts the radius of the circle as an argument.  setRadius: an mutator function for the radius variable. getRadius: an accessor function for the radius variable. getArea: returns the area of the circle, which is calculated as area = pi * radius * radius    getCircumference: returns the circumference of the circle, which is calculated as circumference = 2 * pi * radius         Step1:  Create a declaration of the class.   Step2: Write a program that demonstrates the Circle class by asking the user for the circle’s radius, creating              Circle objects, and then reporting the circle’s area, and circumference.                You should create at least two circle objects, one sets the radius to 0.0 and one accepts the radius as an argument.

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OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career. 

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is: