It is required to design a class that can be used to represent circle objects. The circle class should
have data members to represent the x- and y-coordinates of a circle object's center as well as the
radius, color, area, and perimeter. Normally, a user of this class would set values for all of a circle
object's attributes except the area and perimeter. These attributes can be computed (using
member functions) after the radius is set by the class user.