Learning from the "Pointers-Inheritance and Dynamic Polymorphism" and "Pointers and Dynamic Memory - new - delete" example code in the files above, create three classes that exhibit dynamic...

• Learning from the "Pointers-Inheritance and Dynamic Polymorphism" and "Pointers and Dynamic Memory - new - delete" example code in the files above, create three classes that exhibit dynamic polymorphism using the functions area(), circumference(), and draw():

• Polygon Class




• Superclass


• Variables:




• double width


• double height




• Polymorphic Member Functions:




• area()


• circumference()


• draw()






• Rectangle Class




• Subclass of Polygon


• Variables:




• int size = 5


• double* history_width_ptr


• double* history_height_ptr




• Constructor/Destructor




• Constructor creates space in free memory for two arrays that can store previous values of width and height:




• history_width_ptr = new double[size] // allocate new memory to previous width values


• history_height_ptr = new double[size] // allocate new memory to previous height values








• Destructor




• delete[] history_width_ptr


• delete[] history_height_ptr






• Regular Member Functions:




• set_values()




• Sets values for height and width based upon user input


• Then stores previous values (if any) into the two arrays in free storage pointed at by history_width_ptr and history_height_ptr








• get_values()




• Display the current width and height values




• get_historical_values()




• Display the historical width and height values






• Polymorphic Member Functions:




• area()


• circumference()


• draw()




• Example output

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• 
  
  
  
  • 
    
    
    
    • 
      
      
      
      • You don’t have to draw to scale, but show show a symbolic example of a rectangle
      
      
      
      
    
    
    
    
  
  
  
  

• 
  
  
  
  • Right_Triangle Class
    
    
    
    • Subclass of Polygon
    
    
    • Polymorphic Member Functions:
      
      
      
      • area()
      
      
      • circumference()
      
      
      • draw()
      
      
      
      
    
    
    
    
  
  
  
  

• Learning from the "this Pointer and Methods/Functions Chaining" example code in the files above, add method/function chaining to class Rectangle.




• Using this-> and the return *this within your chaining functions:




• Add these methods/functions:




• 
  get_width()
  


• 
  multiply_by_height()
  


• 
  multiply_by_depth()
  


• 
  display_volume()
  

• Within main()




• Create a program that constructs the class objects and demonstrates their functionalities including:




• Demonstrating dynamic polymorphism by calling the polymorphic member functions: area(), circumference(), and draw()




• Using pointers within the calls to these functions.




• Demonstrate dynamic memory through the use of the history arrays in free storage (the heap) used by Rectangle objects.




• Fill the two arrays with historical values of width and height and display their values.








• Demonstrate methods/functions chaining by calling up these functions through a Rectangle object in main.








• And any other way of showing off your code that you can think of.