Classes and Methods overview

It's time to describe simple class declarations in Perfect. We'll describe class structure and class constructors, how to declare variables and invariants. We'll describe the kinds of method that can be declared. We won't be describing class destructors, because Perfect doesn't have those!

The four kinds of method are:

• functions
• operators
• selectors
• schemas

In this tutorial, we'll only look at functions. Later, we'll look at schemas.

To show you the main ideas, we'll explain the development of a simple Book class.

Next:  Structure of a simple class