[Solved] Write a Circle class

Write a Circle class that has the following member variables : radius: a double pi: a double initialized with the value 3.14159

The class should have the following member functions:

Default Constructor . A default constructor that sets radius to 0.0. Constructor . Accepts the radius of the circle as an argument . setRadius. A 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 getDiameter. Returns the diameter of the circle, which is calculated as diameter = radius * 2 getCircumference. Returns the circumference of the circle, which is calculated as circumference = 2 * pi * radius

Write a program that demonstrates the Circle class by asking the user for the circles radius, creating a Circle object , and then reporting the circles area, diameter, and circumference.

Sample Run:

Calling defeault constructor: The circles radius in the default Circle Object is: 0

Calling setRadius(20) to change radius of default:

The circles radius in the default Circle Object is Now: 20

Creating Circle circle2(10):

The circle2s radius in the circle2 Object is: 10

The circle2s area is therefore: 314.159

The circle2s diameter is therefore: 20

The circle2s circumference is therefore: 62.8318