class Circle():

    #Constructor
    def __init__ (self, radius):
        self.__radius = radius
        self.calcArea()


    def calcArea(self, PI = 3.14):
        self.__area = (self.__radius**2) * PI


    #Get Functions
    def GetArea(self):
        return self.__area


    def GetRadius(self):
        return self.__radius


    #Set Functions
    def SetRadius(self, radius):
        self.__radius = radius
        self.calcArea()


class Cylinder():

    #Constructor
    def __init__(self, radius, height):
        self.__height = height
        self.__base = Circle(radius)
        self.calcVolume()


    def calcVolume(self):
        self.__volume = self.__base.GetArea() * self.__height


    #Get Functions
    def GetVolume(self):
        return self.__volume

    def GetBase(self):
        return self.__base

    def GetRadius(self):
        return self.__base.GetRadius()

    def GetHeight(self):
        return self.__height

    #Set Functions
    def SetRadius(self, radius):
        self.__base.SetRadius(radius)
        self.calcVolume()

    def SetHeight(self, height):
        self.__height = height
        self.calcVolume()


class Cone(Cylinder):

    #Constructor
    def __init__ (self, radius, height):
        Cylinder.__init__(self, radius, height)
        self.calcVolume()


    def calcVolume(self):
        Cylinder.calcVolume(self)
        self.__volume = Cylinder.GetVolume(self) * (1.0/3.0)


    #Get Functions
    def GetVolume(self):
        return self.__volume


    #Set Functions
    def SetRadius(self, radius):
        Cylinder.SetRadius(self, radius)
        self.calcVolume()

    def SetHeight(self, height):
        Cylinder.SetHeight(self, height)
        self.calcVolume()



def main():
        cylinder = Cylinder(5, 6)
        cone = Cone(5, 6)
        circle = Circle(5)

        print cylinder.GetVolume()
        print cone.GetVolume()
        print circle.GetArea()
        cone.SetHeight(7)
        print cone.GetVolume()

main()