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From: addw@root44.UUCP (Alain Williams)
Newsgroups: net.lang.c,net.bugs.4bsd
Subject: Parenthesis error in 4.2bsd c compiler
Message-ID: <4894@root44.UUCP>
Date: Tue, 4-Sep-84 13:19:24 EDT
Article-I.D.: root44.4894
Posted: Tue Sep  4 13:19:24 1984
Date-Received: Sun, 26-Aug-84 01:41:22 EDT
Organization: Root Computers Ltd.
Lines: 26

<gobble-gobble>
I ran the following on a few machines:
main()
{
	unsigned u, u2;
	int	m_7 = -7, two = 2, i, j;
	u = m_7;
	i = (u % two);
	j = ((int) u) % two;
	printf("%u %d %d %d %d\n", u, (int) (u%two), i, (u%two), j);
}

Machine, O/S	Result
Vax 4.2bsd	4294967289 -1 1 1 -1
PDP11/44 S III	65529 1 1 1 -1
68000 S 5	4294967289 1 1 1 -1

Note the second number printed in each case.
Why does the Vax treat '(int) (u%two)' as '((int) u) % two' ????
Most annoying.

	Alain Williams,
	Root Computers Ltd, London.
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