string input

string input

[kotee]

helo

what can i do if i wanna read user input to a string with
length short (i wanna do it in loop), and user write a
very long string. if it happens the next and the next...
input is filled with that trash of first input...
pls hlp

kotee

Re: string input

[Alfred Hilscher]

kotee@ludens.elte.hu wrote:
> 
> helo
> 
> what can i do if i wanna read user input to a string with
> length short (i wanna do it in loop), and user write a
> very long string. if it happens the next and the next...
> input is filled with that trash of first input...
> pls hlp
> 
> kotee

Your looking for Skip_Line ?

Re: string input

[Matthew Heaney]

<kotee@ludens.elte.hu> wrote in message news:GhByriDlSyh1@ludens...
> helo
>
> what can i do if i wanna read user input to a string with
> length short (i wanna do it in loop), and user write a
> very long string. if it happens the next and the next...
> input is filled with that trash of first input...

You can either use a loop, and copy the short string into a longer buffer
(say, an Unbounded_String); or, you could use a recursive solution.

The idiom for reading lines of text in Ada is:

declare
   Line : String (1 .. 10); --say
  Last : Natural;
begin
  loop
     Text_IO.Get_Line (Line, Last);
     <copy Line to an Unbounded_String>
     exit when Last < Line'Last;
   end loop;
end;

That should give you enough info to get started.

Re: string input

[Jeffrey Carter]

Alfred Hilscher wrote:
> 
> kotee@ludens.elte.hu wrote:
> >
> > what can i do if i wanna read user input to a string with
> > length short (i wanna do it in loop), and user write a
> > very long string. if it happens the next and the next...
> > input is filled with that trash of first input...
> > pls hlp
> >
> > kotee
> 
> Your looking for Skip_Line ?

Or perhaps a function such as PragmARC.Get_Line.

-- 
Jeffrey Carter

Re: string input

[kotee]

In article <3C025666.4108D449@icn.siemens.de>, Alfred Hilscher <Alfred.Hilscher@icn.siemens.de> writes:
> kotee@ludens.elte.hu wrote:
>> 
>> helo
>> 
>> what can i do if i wanna read user input to a string with
>> length short (i wanna do it in loop), and user write a
>> very long string. if it happens the next and the next...
>> input is filled with that trash of first input...
>> pls hlp
>> 
>> kotee
> 
> Your looking for Skip_Line ?
yes! :))))

Re: string input

[Robert Dewar]

kotee@ludens.elte.hu wrote in message news:<GhByriDlSyh1@ludens>...
> helo
> 
> what can i do if i wanna read user input to a string with
> length short (i wanna do it in loop), and user write a
> very long string. if it happens the next and the next...
> input is filled with that trash of first input...
> pls hlp
> 
> kotee

Note that if you are using GNAT, the function
Ada.Strings.Unbounded.Get_Line is very convenient
for reading strings of varying length.

Re: string input

[Mark Lundquist]

"Robert Dewar" <dewar@gnat.com> wrote in message
news:5ee5b646.0111262005.74c646cc@posting.google.com...

> Note that if you are using GNAT, the function
> Ada.Strings.Unbounded.Get_Line is very convenient
> for reading strings of varying length.

I believe it's Ada.Strings.Unbounded.Text_Io.Get_Line

-- mark

Re: string input

[Lutz Donnerhacke]

* Mark Lundquist wrote:
>"Robert Dewar" <dewar@gnat.com> wrote in message
>> Note that if you are using GNAT, the function
>> Ada.Strings.Unbounded.Get_Line is very convenient
>> for reading strings of varying length.
>
>I believe it's Ada.Strings.Unbounded.Text_Io.Get_Line

GNAT tends to use recursion, which is known to genereate problems.
 Problematic version:
   http://www.iks-jena.de/mitarb/lutz/ada/reverse_line_tokens__adb.htm
 Scalable version:
   http://www.iks-jena.de/mitarb/lutz/ada/shuffle_text_tokens__adb.htm