circles

Write Circle class.
? The class has one instance variable for diameter.
? The class has methods
o Circle() // sets a default radius 5
o Circle(double radius) // sets radius
// into the instance variable
o Circle(int radius)
o void set(double radius) // sets the radius
// into the instance variable
o void set(int radius)
o double getRadius() // returns the radius
// of the circle
o double circumference() // returns the circumference
// of the circle
o double area() // returns the area
// of the circle

Write an application that uses Circle class.
? The program creates a Circle object with the default constructor, and prints the object by using the methods in the object.
? The program reads a radius from the user, creates a Circle object with the radius, and prints the object by using the methods in the object.
? The program creates a Circle object with the default constructor, sets a distance, and prints the object by using the methods in the object.

Sample output:
Radius = 5.0
Circumference = 31.41593
Area = 78.539825

Radius = 34.0
Circumference = 213.628324
Area = 3631.6815079999997

Radius = 10.0
Circumference = 62.83186
Area = 314.1593