Design a circle class with private member radius representing radius and function get_ Radius () is used to obtain the radius and area () is used to calculate the area of the circle; (2) Define a tabl

1、（1） Design a circle class （circle）, There are private members radius For radius , function get_radius( ) Used to obtain the radius 、area( ) Used to calculate the area of a circle ; （2） Define a table class table, Private data inside height Stands for height , function get_height( ) Used to obtain height ; （3） Define a round table class round_table, It is a subclass of the first two classes , Add member functions show( ) Used to output round table radius 、 Desktop area 、 Height, etc . （4） Test round table class round_table.

class Shape():
    def zhouchang(self):
        pass

    def mianji(self):
        pass

class Circle(Shape):
    PI = 3.14
    def __init__(self, radius):
        self.radius = radius

    def zhouchang(self):
        return 2 * self.PI * self.radius

    def mianji(self):
            return self.PI * self.radius ** 2

class Rectangle(Shape):
    def __init__(self, c, k):
        self.c = c
        self.k = k

    def zhouchang(self):
        return 2 * (self.c + self.k)

    def mianji(self):
        return self.c * self.k

def ShapeCalculate(a):
    s = a.mianji()
    z = a.zhouchang()
    print(' The circumference is {}, The area is {}'.format(s, z))

aa = Circle(4)
bb = Rectangle(3, 4)
ShapeCalculate(aa)
ShapeCalculate(bb)