All the shapes share some features for example each have some area and perimeter. Create a class Shape which will have 1 attribute dimensions (int). Square and rectangle are two derived
classes of Shape. Square class will have one attribute length (int) and rectangle will have length
(int) and width (int). Write following functions for each class:
 Constructor/Destructor
 Deep Copy Constructor
 Parameterized Constructor
 Getter/Setter for dimension and length/width
 Function to get the area of respective shape
 Function to write the shape information to data file in append mode.
 Write a main function to create dynamic array of square and rectangles.
 Also write a function to find the rectangle which will cost the least to paint. (Cost=area x
paint_cost, paint_cost can be any constant).