Re: a little help

[gerhard.nospam@bigfoot.de (Gerhard Häring)]

On Tue, 16 Oct 2001 14:23:58 +0200, F <phosphorus@libero.it> wrote:
>in-side variable and the parameter j is in out) and there are still the same
>problems.
>The problem is the second recall of my procedure.
>Please help me................. :-)
>
>
>P.S.
>I send you the entire new program
>
>procedure prova is
>    type st is new string;
>    b:st(1..20);
>    ind:integer:=1;
>
>    procedure leggis (j: in out st; i: in out integer) is
>       c:character;
>    begin
>        while not end_of_line loop
>            get(c); j(ind):=c; i:=i+1;
>        end loop;
>    end leggis;
>
>begin
>    new_line;
>    leggis(b,ind);
>    for i in 1..ind loop
>        put(b(i));
>    end loop;
>    ind:=1;
>    new_line;
>    -- this is the beginning of my problems!!
>    leggis(b,ind);
>    for i in 1..15 loop
>        put(b(i));
>    end loop;
>end prova;

You're still using global variables. Don't. These are almost always
causes of errors. If you need variables in your main procedure, declare
them in a declare block like

declare
    ind := integer := 1;
begin
    -- main procedure logic here
end prova;

I don't want to entirely debug your program (it could be written much
simpler with using the appropriate stuff from Ada.Text_IO and perhaps
Ada.Strings.(Un)bounded). But now the global variables are causing the
bugs. You should avoid them whenever you can.

Gerhard
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