From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,9c98277c71c4cdcc
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2001-12-11 10:37:51 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!hammer.uoregon.edu!skates!not-for-mail
From: Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>
Newsgroups: comp.lang.ada
Subject: Re: Unconstrained arrays
Date: 11 Dec 2001 13:22:50 -0500
Organization: NASA Goddard Space Flight Center
Message-ID: <u7krtmxad.fsf@gsfc.nasa.gov>
References: <3C163FBE.9CB75916@rz.uni-karlsruhe.de>
NNTP-Posting-Host: anarres.gsfc.nasa.gov
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: skates.gsfc.nasa.gov 1008095162 2410 128.183.220.71 (11 Dec 2001
 18:26:02 GMT)
X-Complaints-To: dscoggin@cne-odin.gsfc.nasa.gov
NNTP-Posting-Date: 11 Dec 2001 18:26:02 GMT
User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7
Xref: archiver1.google.com comp.lang.ada:17778
Date: 2001-12-11T18:26:02+00:00
List-Id: <comp.lang.ada>

Michael Unverzagt <uhcm@rz.uni-karlsruhe.de> writes:

> Hi!
> 
> We have to write a programm that uses an unconstrained array of
> ustrings, where the size of the array should be determined by user
> input...
> 
> How does this work? Someone told me, I have to use subtypes but...
> Does anyone know a simple example where I can learn how I can define the
> size of an array at runtime by user input?

Warning, this code has not been compiled (it's homework, so that's
your job :).

procedure Homework is
    Array_Length : Integer;

    type Ustring_Array is array (Integer range <>) of Ustring;
begin

    -- Use Text_IO or something to set Array_Length here!

    declare
        My_Array : Ustring_Array (1 .. Array_Length);
    begin
        -- do stuff with My_Array
    end;

end Homework;

The basic idea is that an array can be declared in an inner block, and
the length of the array can be set by a variable.

-- 
-- Stephe