How do I make my program beep.

[Richard A. O'Keefe]

In article <1990Jun6.124609.7316 at agate.berkeley.edu>, dankg at tornado.Berkeley.EDU (Dan KoGai) writes:
> /* #ifdef UNIX */
> #define RETURN '\n' /* for portability. \r for Macintosh, et al */
> #define mybeep beep() putchar(\07)	/* Also for portability */
> /* endif */

(1) Isn't \n supposed to be mapped to whatever the local end of line
    convention is?  Is it legal for a Mac C compiler to map \n to
    anything other than CR, or to something which will have the same
    effect when output?

(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))

(3) This is better as a function than a macro anyway.
-- 
"A 7th class of programs, correct in every way, is believed to exist by a
few computer scientists.  However, no example could be found to include here."