July 2008
Beginner
356 pages
6h 8m
English
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Case Study: Drawing Shapes
Let's finish off this chapter with a more practical example of using inheritance. The task is to be able to calculate the area and the perimeter of different shapes, as well as to draw them, while reusing as much code as possible.
Analysis
Let's have one Shape constructor that contains all of the common parts. From there, we can have Triangle, Rectangle and Square constructors, all inheriting from Shape. A square is really a rectangle with same-length sides, so let's reuse Rectangle when building the Square.
In order to define a shape, we'll use points with x and y coordinates. A generic shape can have any number of points. A triangle is defined with three points, a rectangle (to keep it simpler)—with one point and the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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