Create a program that calculates the area of various shapes.

Console

Specifications

• Create an abstract class named Shape. This class should contain virtual member function named get_area() that returns a double type.
• Create a class named Circle that inherits the Shape class and contains these constructors and member functions:
  • Circle(double radius)
  • double get_radius()
  • void set_radius(double radius)
  • double get_area()
• Create a class named Square that inherits the Shape class and contains these constructors and member functions:
  • Square(double width)
  • double get_width()
  • void set_width(double width)
  • double get_area()
• Create a class named Rectangle that inherits the Square class and contains these constructors and member functions:
  • Rectangle(double width, double height)
  • double get_height()
  • void set_height(double height)
  • double get_area()
• Use the following formulas to calculate area:
  • Circle: Area = radius² * pi
  • Square: Area = width²
  • Rectangle: Area = width * height
• In the main.cpp class, use a function named display_area() to display the area of each shape.
• Use the console namespace presented in chapter 7, p.274~277, to get and validate the users entries.

The Area Calculator Circle, square, or rectangle? (c/s/r): c Enter radius: 15 Area: 706.858 Continue? (y): y circle, square, or rectangle? (c/s/r):r Enter width 15 Enter height: 20 Area: 300 continue? (y): n Bye