example c program that does "beep"

[Thomas Dickey]

On Sat, Dec 26, 2009 at 03:33:27PM +0000, Anton Shterenlikht wrote:
> On Fri, Dec 25, 2009 at 08:49:14PM +0100, Polytropon wrote:
> > On Fri, 25 Dec 2009 18:58:26 +0000, Anton Shterenlikht <mexas at bristol.ac.uk> wrote:
> > > How can I get a beep from c?
> > > I looked at curses and syscons.c, but
> > > still not clear.
> > 
> > If you want to use NCURSES / CURSES, it's a bit complicated.
> > 
> > Otherwise, just output %c (the character) 0x07, BEL, which
> > generates an audible bell, or beep.
> > 
> > 
> > *** text/plain attachement has been stripped *** RETRY ***
> > 
> > /* beepflash.c
> >  * -----------
> >  * cc -Wall -lcurses -o beepflash beepflash.c
> >  *
> >  */
> > 
> > #include <stdio.h>
> > #include <ncurses.h>
> > 
> > int main(int argc, char *argv[])
> > {
> > 	initscr();
> > 	cbreak();
> > 	noecho();
> > 	nonl();
> > 	intrflush(stdscr, FALSE);
> > 	keypad(stdscr, TRUE);
> > 	start_color();
> > 
> > 	printf("beep: %d\n", beep());
> > 	fflush(stdout);
> > 
> > 	printf("flash: %d\n", flash());
> > 	fflush(stdout);
> > 
> > 	return 0;
> > }
> 
> Instead of a beep and a flash I get:
> 
> beep: 0./beepflash
>        flash: 0
>                HAMOR>

That sounds about right, given the code shown above.
If you'd used just
	beep();
	refresh();

instead of the printf/fflush, it would clear the screen and beep - if the
terminal description says it can do the beep.

In the ncurses sources, progs/clear.c is a simple program which sets
up the terminal and calls the tputs function - something like what you're
trying to do.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net
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