1. Object Oriented Programming and Euphoria
>From my reading I've gained the impression that routine_id() facilitates
OOP. I'm fairly new to programming, but would appreciate a simple
understanding of the way OOP may be achieved in Euphoria. I've read about
routine_id() in the documentation, and can see what it does, but not how it
relates to OOP.
For example suppose I define a general class called "Shape". Suppose I
declare its (private) data members to be "length", "height", and "area".
Suppose I declare its (public) member functions to be "CalculateArea" and
"ShowResult". I then create a constructor to allow me to put data into
"length" and "height". I define "CalculateArea" such that: area = length *
height. And I define "ShowResult" using an appropriate output statement. I
call a specific instance of "Shape" - let's say "Square" - input specific
values for "length" (eg 3) and "height" (eg 4), return a value of 12 from
"CalculateArea", and display it on screen using "ShowResult".
Is it possible to use this trivial example to demonstrate how the OOP
concept can be handled by Euphoria?
Thank you
Alex Caracatsanis
2. Re: Object Oriented Programming and Euphoria
Caracatsanis Pty Ltd wrote:
> >From my reading I've gained the impression that routine_id() facilitates
> OOP. I'm fairly new to programming, but would appreciate a simple
> understanding of the way OOP may be achieved in Euphoria. I've read about
> routine_id() in the documentation, and can see what it does, but not how it
> relates to OOP.
>
> For example suppose I define a general class called "Shape". Suppose I
> declare its (private) data members to be "length", "height", and "area".
> Suppose I declare its (public) member functions to be "CalculateArea" and
> "ShowResult". I then create a constructor to allow me to put data into
> "length" and "height". I define "CalculateArea" such that: area = length *
> height. And I define "ShowResult" using an appropriate output statement. I
> call a specific instance of "Shape" - let's say "Square" - input specific
> values for "length" (eg 3) and "height" (eg 4), return a value of 12 from
> "CalculateArea", and display it on screen using "ShowResult".
>
> Is it possible to use this trivial example to demonstrate how the OOP
> concept can be handled by Euphoria?
>
> Thank you
>
> Alex Caracatsanis
Euphoria doesn't have any built-in OOP syntax, and routine_id isn't directly
related to OOP. routine_id is simply a way of getting a pointer to a function
(then you can use call_proc or call_func to call it). There are several
libraries which allow you to do OOP in Euphoria, but their use of routine_id
is simply for dynamic calls - it is not related to OOP.
Jeff Fielding
