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...

1. 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.