Design a class Parallelogram that contains two private data members:

• -double length,
• -double height.
• Parallelogram class should also have the following public methods:
• -parameterized constructor,
• -a method to calculate the area of the parallelogram.
• Design another class Rectangle that inherits from Parallelogram (since a Rectangle is-a Parallelogram). Class Rectangle should have following public members:
• -parameterized constructor,
• -a method to calculate perimeter,
• -a method to tell if the Rectangle object is a Square.
• Develop the main function to fully test these two classes.