RE: Programing in C...
I stand corrected...here's the modified code then:
int main(void)
{
printf("\a");
return(0);
}
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Hamish Moffatt
Sent: Friday, April 21, 2000 12:23 AM
To: [EMAIL PROTECTED]
Subject: Re: Programing in C...
On Thu, Apr 20, 2000 at 08:02:32AM -0700, Michael Anderson wrote:
> if you just want a beep, then try for more portable code:
> #include
>
> void main(void)
> {
> printf("\7");
> }
Actually, printf("\a") would be more portable. \7 assumes your computer
is using the ASCII character set.
If you want to get really picky, a lot of ANSI C compilers will not
compile "void main" because it is not a valid prototype for main.
main must return an int.
Hamish
--
Hamish Moffatt VK3SB <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
Re: Programing in C...
On Thu, Apr 20, 2000 at 08:02:32AM -0700, Michael Anderson wrote:
> if you just want a beep, then try for more portable code:
> #include
>
> void main(void)
> {
> printf("\7");
> }
Actually, printf("\a") would be more portable. \7 assumes your computer
is using the ASCII character set.
If you want to get really picky, a lot of ANSI C compilers will not
compile "void main" because it is not a valid prototype for main.
main must return an int.
Hamish
--
Hamish Moffatt VK3SB <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
RE: Programing in C...
if you just want a beep, then try for more portable code:
#include
void main(void)
{
printf("\7");
}
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Shawn T. Rutledge
Sent: Thursday, April 20, 2000 7:43 AM
To: [EMAIL PROTECTED]
Subject: Re: Programing in C...
Thanks! I was wanting to do that just the other day, for tuning up
my radio... wanted to write a script to beep whenever an incoming
packet was decoded, with a different tone for different senders...
I was pinging two stations at once, and watching the "quality" signal
from my TNC, so my eyes were busy and I would've liked to hear the
beeps when I had it tuned right and it actually got a packet (hiss -
voltage goes up - "beep!"). Was tweaking the discriminator can in a
Mitrek, and it's really touchy. So now I know how to write a beep
utility to call from a shell script.
On Thu, Apr 20, 2000 at 07:46:36AM -0400, Dave Mielke wrote:
> [quoted lines by r00t the LiNuXeRRR on April 20, 2000, at 10:59]
>
> > Does exist a sound(); function like the one from Borland C from
> >dos that turns on the speaker at a given frequance... The sound();
> >function doesn't work in linux...
>
> Yes. You do it through ioctl. Open a file descriptor to the console:
>
> int fd = open("/dev/tty0", O_WRONLY);
>
> Start the tone by:
>
> ioctl(fd, KIOCSOUND, (119 / herz));
>
> Stop the tone by:
>
> ioctl(fd, KIOCSOUND, 0);
>
> For O_WRONLY, you'll need:
>
> #include
>
> For KIOCSOUND, you'll need:
>
> #include
--
___ Shawn T. Rutledge / KB7PWD [EMAIL PROTECTED]
(_ | |_) http://www.bigfoot.com/~ecloud [EMAIL PROTECTED]
__) | | \
Get money for spare CPU cycles at http://www.ProcessTree.com/?sponsor=5903
Re: Programing in C...
Thanks! I was wanting to do that just the other day, for tuning up
my radio... wanted to write a script to beep whenever an incoming
packet was decoded, with a different tone for different senders...
I was pinging two stations at once, and watching the "quality" signal
from my TNC, so my eyes were busy and I would've liked to hear the
beeps when I had it tuned right and it actually got a packet (hiss -
voltage goes up - "beep!"). Was tweaking the discriminator can in a
Mitrek, and it's really touchy. So now I know how to write a beep
utility to call from a shell script.
On Thu, Apr 20, 2000 at 07:46:36AM -0400, Dave Mielke wrote:
> [quoted lines by r00t the LiNuXeRRR on April 20, 2000, at 10:59]
>
> > Does exist a sound(); function like the one from Borland C from
> >dos that turns on the speaker at a given frequance... The sound();
> >function doesn't work in linux...
>
> Yes. You do it through ioctl. Open a file descriptor to the console:
>
> int fd = open("/dev/tty0", O_WRONLY);
>
> Start the tone by:
>
> ioctl(fd, KIOCSOUND, (119 / herz));
>
> Stop the tone by:
>
> ioctl(fd, KIOCSOUND, 0);
>
> For O_WRONLY, you'll need:
>
> #include
>
> For KIOCSOUND, you'll need:
>
> #include
--
___ Shawn T. Rutledge / KB7PWD [EMAIL PROTECTED]
(_ | |_) http://www.bigfoot.com/~ecloud [EMAIL PROTECTED]
__) | | \
Get money for spare CPU cycles at http://www.ProcessTree.com/?sponsor=5903
Re: Programing in C...
r00t the LiNuXeRRR wrote: > Does exist a sound(); function like the one from Borland C from > dos that turns on the speaker at a given frequance... The sound(); > function doesn't work in linux... > Thanx for help... > Seby... I'm not positive, but I know that some compilers, Borland for one, have their own proprietary way of doing some things, especially if its for one platform only (like DOS)- so in some cases all the stuff you can do with Borland C in DOS you couldn't do with GCC in UNIX/Linux. It's non-standard functions. GCC (egcs, whatever) is a Standard C compiler, conforms to ANSI C standard, so it wouldn't have any of those things that are extra/proprietary (as you probably know). I think there may be a function in std C libs for doing that though but I can't recall it off the top of my head. So to answer your question I can't say I know the answer.. ;-). I have my C textbook lying around I can look it up... -- Matt M LinuxKnight [EMAIL PROTECTED]
