Re: Why this behavior?

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: Why this behavior?
Date	Sat, 28 Mar 2015 17:34:56 -0700
Organization	None to speak of
Lines	27
Message-ID	<877fu0myj3.fsf@kst-u.example.com> (permalink)
References	<mf620e$sh7$1@dont-email.me> <fc015833-c906-498e-8553-3d0a741a16c0@googlegroups.com> <mf6hvl$hek$1@dont-email.me>
Mime-Version	1.0
Content-Type	text/plain
Injection-Info	mx02.eternal-september.org; posting-host="c77ff4d35e33d1c939d3461ebde8dd0d"; logging-data="32232"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/+dmU5sV+u+eLrW8fxthqf"
User-Agent	Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
Cancel-Lock	sha1:yUMYsBvgnRffh9ce7YZ/8InUA2M= sha1:5oRcQ05wsiUemQv79bp/YCGdk20=
Xref	csiph.com comp.lang.c:59183

Show key headers only | View raw

bilsch <king621@comcast.net> writes:
>> However there's a freopen() command that you can use to redirect stdin
>> stdout and stderr. So commonly when programs are being debugged, and the
>> developer wants to scatter printf() and scanfs(), the streams are
>> attached to an interactive prompt, which often pops up in its own
>> window.
>> If you do a web search on your operating system and "redirecting stdout
>> / stdin" you'll find out how to do this.
>
> I searched as you suggested and read a lot I don't understand - and 
> nothing specific to anything I do understand.  Apparently I need to use 
> this freopen() command in my program and somehow get an interactive 
> window to pop up that will show the text output by the printf() commands 
> and accept input to the scanf() commands which are in my program. The 
> program needs to get Ubuntu to provide this interactive window or does 
> the code have to create the interactive window? 

If you're on Ubuntu, just run the program from a shell prompt.  Its
stdin, stdout, and stderr will be inherited from the shell: stdin will
read from the keyboard, and stdout and stderr will write to the terminal
(emulator).

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

Thread

Why this behavior? bilsch <king621@comcast.net> - 2015-03-28 11:06 +0000
  Re: Why this behavior? Richard Heathfield <rjh@cpax.org.uk> - 2015-03-28 11:16 +0000
    Re: Why this behavior? bilsch <king621@comcast.net> - 2015-03-28 11:22 +0000
      Re: Why this behavior? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-03-28 15:22 +0000
        Re: Why this behavior? Richard Heathfield <rjh@cpax.org.uk> - 2015-03-28 21:42 +0000
  Re: Why this behavior? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-28 05:53 -0700
    Re: Why this behavior? bilsch <king621@comcast.net> - 2015-03-28 15:39 +0000
      Re: Why this behavior? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-28 09:24 -0700
        Re: Why this behavior? bilsch <king621@comcast.net> - 2015-03-28 17:05 +0000
        Re: Why this behavior? bilsch <king621@comcast.net> - 2015-03-28 17:08 +0000
      Re: Why this behavior? Keith Thompson <kst-u@mib.org> - 2015-03-28 17:34 -0700
  Re: Why this behavior? Lőrinczy Zsigmond <nospam@for.me> - 2015-03-28 14:35 +0100

csiph-web