Towards our first C++ example
In our example, we are dealing here with simple geometrical bodies, such as cylinders and cubes (and maybe many more)
We are -- for now -- interested in only two aspects of those bodies: their volume and their surface.
Obviously these (having a volume and having a surface) are properties of all bodies. For each body there are a well-defined numbers for both quantities.
This is what we will (in a moment) use to show off the OO implementation of cylinders and cubes.