[1739] in Athena Bugs
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daemon@ATHENA.MIT.EDU (don@ATHENA.MIT.EDU)
Fri Feb 3 22:51:46 1989
From: <don@ATHENA.MIT.EDU>
Date: Fri, 3 Feb 89 22:51:35 EST
To: bugs@ATHENA.MIT.EDU, kaufer@ATHENA.MIT.EDU
/* here's a bug in vax saber 2.0.4. see K&R, 1st ed., p 148-9.
* it's possible that sscanf() is wrong, and saber is right,
* depending upon on which page you read the description of %1s.
*/
#include <stdio.h>
main() {
int a = 0xffff; char b = 'b';
printf("a = %x, b = %c\n", a, b);
sscanf("x", "%c", &b);
printf("a = %x, b = %c\n", a, b);
sscanf(" x ", "%1s", &b);
printf("a = %x, b = %c\n", a, b);
}
/* here's what happens with pcc on the vax:
tartaros 88% a.out
a = ffff, b = b
a = ffff, b = x
a = ff00, b = x
* this was a bitch to find,
* because saber doesn't trash a's contents in the 2nd sscanf, as it should.
*/
