Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!rutgers!umn-d-ub!halam2
From: halam2@umn-d-ub.D.UMN.EDU (Haseen I. Alam)
Newsgroups: comp.lang.c
Subject: Re: How do I make my program beep.
Keywords: beep
Message-ID: <3527@umn-d-ub.D.UMN.EDU>
Date: 8 Jun 90 16:15:11 GMT
References: <3472@umn-d-ub.D.UMN.EDU> <1990May27.000808.13551@utzoo.uucp> <1990Jun6.124609.7316@agate.berkeley.edu> <3168@goanna.cs.rmit.oz.au> <43605@ism780c.isc.com>
Reply-To: halam2@ub.d.umn.edu (Haseen I. Alam)
Organization: University of Minnesota, Duluth
Lines: 57

In article <43605@ism780c.isc.com> marv@ism780.UUCP (Marvin Rubenstein) writes:
>In article <3168@goanna.cs.rmit.oz.au> ok@goanna.cs.rmit.oz.au (Richard A. O'Keefe) writes:
>>(2) #define mybeep putchar('\7')
>>    has a fairly serious defect:  output to stdout is often buffered or
>>    line-buffered, and '\7' is not a complete record.  You need
>>	#define mybeep (putchar('\7'), fflush(stdout))
>>
>
>putchar('\7') has an even more serious defect.  The reason for beeping is
>to notify the user of the program of something while the program is
>*running*. There is no guarantee that sending a '\7' to stdout will cause an
>beep.  Stdout may well be a diskfile.  The output must be directed to a
>device that will make a noise that the user can hear.  I know of no portable
>way to do this.
>
>    Marv Rubinstein

  How about using fprintf to print to stderr?  A non-ANSI example follows.
  Even if you redirect the output to a file it will still beep.  But probably
  will not if you send it to /dev/null.  I know a lot of people like to
  have it as a macro, but I have adopted the following, mainly because I can
  specify how many beeps I want in a call, and 3 in a row almost makes a 
  melody!!!!

  Haseen.

  BTW: a BEEP in the right time will save a lot of cries.


/*  Here comes the three beepers...
    BEEP-BEEP-BEEP-I-RAY!!!!!!!!			 	*/

#include <stdio.h>
/* #define BELL '\a'		/* use it if you got it 	*/
#define BELL '\007'		/* or live with what you have 	*/

void beep (times)
    int times ;
{
    int i, j ;
    for (i=0; i < times; i++)
    {
	fprintf (stderr, "%c", BELL) ;
	for (j=0; j < 100000; j++) ;		/* just a delay */
    }
    fflush (stderr) ;
}

main ()
{
    beep (3) ;
}
-- 
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 |  Haseen Ibne Alam                       Tel: (218)-728-2139        |
 |  email : halam1@ub.d.umn.edu      or    halam@cola.d.umn.edu       |
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