c++ (header file)

. Interface NumberSystem whose methods are void method named Addition () that takes no parameters. void method named Subtraction that takes no parameters. Derived class Circle that publicly inherits Shape whose fields and methods are private double field named radius. private double constant static field named PI equal to 3.1415926. public default constructor that assigns 1 to radius. public copy constructor. public assignment operator. public empty destructor. public double constant method named GetRadius that takes no parameters. It returns radies. public double static method named GetPI that takes no parameters. It returns PI. public double static method named GetDiameter() that takes no parameters. It returns the diameter of the circle public void method named Set Radius() that takes a double parameter. It assigns the parameter to radius only if the parameter is positive otherwise, it does nothing. public overridden Area(). It returns the area of the circle publie overridden Perimeter(). It returns the circumference of the circle