Classes

Chris Angelico rosuav at gmail.com
Fri Oct 31 21:51:06 CET 2014


On Sat, Nov 1, 2014 at 4:43 AM, Rob Gaddi
<rgaddi at technologyhighland.invalid> wrote:
> Define a Square class, subclassed from Rectangle.  Use getters/setters
> to enforce that the length and width must be equal.  Confirm that
> length and width remain locked, and that perimeter() and area() work
> correctly.

Here we go again...

http://en.wikipedia.org/wiki/Circle-ellipse_problem

Square and Rectangle are just as "obviously" the other way around in
the hierarchy, and it's wrong whichever way you do it. Not a good
example.

ChrisA



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