rokicki@navajo.STANFORD.EDU (Tomas Rokicki) (08/31/86)
[ `---\- For the plane eater ]
/*
* This program should print out:
* -1 0
* because the subtraction should be done with signed
* arithmetic; it did under 4.2 bsd on a VAX. Now,
* however, under 4.3 bsd, it prints out
*
* -1 1
*
* Anyone know to whom I should post this bug?
*/
main () {
register unsigned char a=1, b=2 ;
printf("%d %d\n", ((int)(a))-((int)(b)), ((int)(a))-(int)(b))) > 1 ) ;
}
--tomjsdy@hadron.UUCP (Joseph S. D. Yao) (09/16/86)
In article <809@navajo.STANFORD.EDU> rokicki@navajo.STANFORD.EDU (Tomas Rokicki) writes: >/* This program should print out: -1 0 > * however, under 4.3 bsd, it prints out -1 1 */ >main () { > register unsigned char a=1, b=2 ; > printf("%d %d\n", ((int)(a))-((int)(b)), ((int)(a))-(int)(b))) > 1 ) ; >} Your parenthesisation is bad: in this form, no compiler could accept it. printf("%d %d\n", ((int)(a))-((int)(b)), ((int)(a))-(int)(b))) > 1 ); 1 23 33 32 23 33 32 23 33 32 2 22 210 -1 I'm not suggesting that this is your entire problem; but why don't you turn on the sm [showmatch] option of vi [which I normally hate], re-write this line, and try it again? Then post the results. -- Joe Yao hadron!jsdy@seismo.{CSS.GOV,ARPA,UUCP} jsdy@hadron.COM (not yet domainised)