fnf@mcdsun.UUCP (Fred Fish) (11/15/86)
[Is there a sun specific newsgroup under the new usenet organization, other
than mod.computers.sun?]
/*
* DESCRIPTION
*
* The C compiler has a bug with use of the comma operator in
* return expressions.
*
* SUN OS REVISION
*
* 3.0 SUNBIN DOMESTIC 68020
* Part Number: 700-1114-05 Rev. A
*
* COMMENTS
*
* From K&R, pages 58-59:
*
* "A pair of expressions separated by a comma is evaluated
* left to right, and the type and value of the result are
* the type and value of the right operand."
*
* This bug has apparently been fixed in 3.2.
*
*/
#include <stdio.h>
main ()
{
int value;
value = nobug ();
printf ("nobug() returns %d, %#x, %#o\n", value, value, value);
value = bug ();
printf ("bug() returns %d, %#x, %#o\n", value, value, value);
value = bugworkaround ();
printf ("bugworkaround() returns %d, %#x, %#o\n", value, value, value);
}
int nobug ()
{
return (0202);
}
int bug ()
{
return (4, 0202);
}
int bugworkaround ()
{
return (4, (int)0202);
}
--
===========================================================================
Fred Fish Motorola Computer Division, 3013 S 52nd St, Tempe, Az 85282 USA
{mcdsun,well}!fnf (602) 438-5976
===========================================================================