Re: Learning Ada but missing the basics?

[ryan k <ryan@ryankaskel.com>]

On Jun 30, 5:48 pm, "Jeffrey R. Carter"
<spam.jrcarter....@spam.acm.org> wrote:
> ryan k wrote:
> > I'm trying to learn Ada because a) I think it's cool to learn new
> > computer languages and b) it looks like a good one. I've gone the
> > through a lot of the tutorials but lets say have package MyPackage and
> > 5 subprograms are in the body. Which procedure is run first? Is it
> > sequential? Is there some sort of equivalent to C's main()? Is a
> > binary created for every package? I guess I don't understand where
> > things start and end. Any help or links are greatly appreciated!
>
> You've clearly missed something.
>
> Ada is a concurrent language; this answer assumes you haven't created any tasks.
>
> The thread of control in an Ada program is called the environment task. It
> performs elaboration and initialization as needed, calls the main-program
> procedure, and finally performs any finalization that's needed.
>
> The main-program procedure is one that you designate during the building of the
> executable.
>
> Subprograms in packages are only "run" if they're called.
>
> Consider the typical hello-world example:
>
> with Ada.Text_IO;
>
> procedure Hello is
>     -- null;
> begin -- Hello
>     Ada.Text_IO.Put_Line (Item => "Hello, World!");
> end Hello;
>
> Here, procedure Hello is the main-program procedure. You indicate that when
> building the executable. For instance, with GNAT you would put it in a file
> named hello.adb and might say
>
> gnatmake -gnato -fstack-check -O1 hello
>
> which will create an executable named hello[.platform-dependent-extension].
>
> Ada.Text_IO is a package which contains a number of subprograms. In this
> example, we call its procedure Put_Line. Put_Line may call other subprograms in
> Ada.Text_IO or in other packages. These are the only subprograms that are "run".
>
> HTH.
>
> --
> Jeff Carter
> "Your mother was a hamster and your father smelt of elderberries."
> Monty Python & the Holy Grail
> 06

Could anyone point me to an SVN repository for a good, well written
open source Ada application?