Re: some simple questions

["David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>]

----- Original Message -----
From: "Daniel Sch�le" <uval@rz.uni-karlsruhe.de>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: February 21, 2003 4:56 PM
Subject: some simple questions


> Hi all
>
> I am learning Ada on doing
> I have found some small examples on web and
> now I'm trying to put the mosaic stones together
>
> my questions are
>
> given
>     type pint is access integer;
>     pi: pint:=new integer;
>
> how do I delete the allocated object?
> free(pi);    --doesn't work
> (I'm pretty sure Ada doesn't have Garabge Collector)
You need to instantiate Ada.Unchecked_Deallocation for the type integer.
Then you call the instantiated procedure to deallocate the memory.
See section 13.11.2 of the Ada Reference Manual.

>
> is there a syntax available to initialize allocated object (like in C++)?

Yes.  You would say
pi : pint := new Integer'(1234);

See sections 4.8 and 4.7 of the Ada Reference Manual.
> int * pi=new int(0);
> now I am doing that this way
> pi.all:=0;
>
> what is the proper way to assure that pointer points to valid object?
>
> and last one
> what's "std::system("clear");" translated to Ada
> (OS Linux)
>
> sorry if it's faq
>
> Thanks
>
> Daniel
>
>
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