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From: Kas_le_chat <kasino@attcanada.net>
Subject: Re: loop and constraint error- I really nead help for this problem
 thanks
Date: 1998/10/12
Message-ID: <36216FD1.6D9D@attcanada.net>#1/1
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Reply-To: kasino@attcanada.net
NNTP-Posting-Date: Mon, 12 Oct 1998 02:46:38 GMT
Newsgroups: comp.lang.ada
Date: 1998-10-12T00:00:00+00:00
List-Id: <comp.lang.ada>

Kas_le_chat wrote:
> 
> I am new to ADA and I have a program to do in this langage at school.
> In this projet I have to get a quantity between 0 and 50.From that
> quantity I have to distribute it in some variables depending on a
> certain range.When i am out of that fiel 0..50 the program end whit
> constraint error, but I nead it to loop to the get variable and dont
> know how to do this.If you got any answers it will be welcome. Thanks.
> This is the code I am working whit:
> With text_io;
> use text_io;
> 
>         procedure pomme is
> 
>         package es_reels is new text_io.float_io(float);
>         --------d�clation des constantes-----------------------
>         c_5kg :constant float := 5.0;
>         c_10kg:constant float := 10.0;
>         c_20kg:constant float := 20.0;
> 
>         ---------d�claration des variables----------------------
> 
>         v_pommes : float range 0.0..50.0; --Pour indiquer les bornes de 0 � 50
> kg;
>         v_pomme1 : float; --de o � 5 kg, n�cessaire au calcul du prix;
>         v_pomme2 : float; --de 05 � 10 kg, n�cessaire au calcul du prix;
>         V_pomme3 : float; --de 10 � 20 kg, n�cessaire au calcul du prix;
>         v_pomme4 : float; --de 20 � 50 kg, n�cessaire au calcul du prix;
> 
>     ---------exeptions--------------------------------------
>     e_exeption: exception;
> 
>                 begin
> 
> 
>                 text_io.put("Entrez la quantitee de pomme, MINIMUM 0 et MAXIMUM 50 Kg:
> ");
>         es_reels.get(v_pommes);--Pour obtenir la quantite de pommes
>         text_io.skip_line;
> 
> 
>         if
>                                 ((0.0 < v_pommes) and (v_pommes <= float(5.0))) then v_pomme1 :=
> v_pommes; v_pomme2 := 0.0; v_pomme3 := 0.0;v_pomme4 := 0.0;
> 
>         elsif
>                                 ((05.0 < v_pommes) and (v_pommes <= 10.0)) then v_pomme2 := v_pommes
> - c_5kg;
>                                 v_pomme1 := 5.0; v_pomme3 := 0.0; v_pomme4 := 0.0;
> 
> 
>         elsif
>                                 ((10.0 < v_pommes) and (v_pommes <= 20.0)) then v_pomme3:= v_pommes
> - c_10kg;
>                                 v_pomme2 := 5.0; v_pomme1 := 5.0; v_pomme4 := 0.0;
> 
> 
>         elsif
>                                 ((20.0 < v_pommes) and (v_pommes <= 50.0)) then v_pomme4 := v_pommes
> - c_20kg;
>                                 v_pomme3 := 10.0; v_pomme2 := 5.0; V_pomme1 := 5.0;
> 
>         end if;
> 
>             exception when e_exeption =>
>                 if ((v_pommes < float(0.0)) or (v_pommes >
> float(50.0)))then  -- condition, la quantite de pomme doit etre plus
> grande que 0.0 et plus petite que 50.
> 
>                 text_io.put("La quantit� de pomme n'est pas comprise
> entre 0 et 50 kg. ");loop
> 
> 
>  end loop;
> end if;
> 
>                                 --------Sortie--------------------
> 
>                                 text_io.put("pomme1=  ");
>                                 es_reels.put (item=>V_pomme1);
>                                 text_io.skip_line;
> 
>                                 text_io.put("pomme2=  ");
>                                 es_reels.put (item=>V_pomme2);
>                                 text_io.skip_line;
> 
>                                 text_io.put("pomme3=  ");
>                                 es_reels.put (item =>V_pomme3);
>                                 text_io.skip_line;
> 
>                                 text_io.put("pomme4=  ");
>                                 es_reels.put (item =>V_pomme4);
>                                 text_io.skip_line;
> 
> 
> 
>                                 end pomme;