sd

[dilita.mido]

Draw an inheritance hierarchy for classes Quadrilateral, TRapezoid, Parallelogram, Rectangle and Square. Use Quadrilateral as the base class of the hierarchy. Make the hierarchy as deep as possible.

[Gribouillis]

The trick is to use the is-a relationship. For example "a cat is a mammal" implies that class Cat is a subclass of class Mammal. In practice of course, there are other possible designs.

[james.lu.75491856]

class Quad(object):
class Par(Quad):
class Trap(Quad):
class Rect(Par):
class Square(Rect):

Par is a Quad
Trap is a Quad
Rect is a Quad
Square is a Quad
Rect is a Par
Square is a Par
Square is a Rect
Q->Par---->Rect-->Square
->Trap