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From: ericco@stew.ssl.berkeley.edu (Eric C. Olson)
Newsgroups: comp.sys.atari.st
Subject: Re: Bug in TURBO-C V1.0
Message-ID: <1990Feb21.204744.560@agate.berkeley.edu>
Date: 21 Feb 90 20:47:44 GMT
References: <8910270333.AA14741@cscwam.UMD.EDU> <0927891128429423@thelake.UUCP> <1990Feb14.173746.28244@agate.berkeley.edu> <1302@lzsc.ATT.COM> <1990Feb19.092139.3131@pcsbst.pcs.com>
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roland@cochise.pcs.com (Roland Rambau) writes:
>hcj@lzsc.ATT.COM (HC Johnson) writes:
>->> >    #define MAX  -32768
>->> >    main()
>->> >    {
>->> >    printf("1: %d\n", MAX);
>->> >    printf("2: %d\n", (int)MAX);
>->> >    }
>->> 
>->> This is not a bug, its a feature.  MAX is not a number, its an expression.
>->> Thus, the evaluation of MAX is a long int.  The first printf only prints
>->K&R specify that constants are int's.  Not a long int.

Like I said "MAX is not a number, its an expression."  There is an integer
in the expression (the number 32768).  But there is also an operator (the
unary minus).  This makes MAX an expression, not a number.  Thus the real
question is what does K&R say integer expression are evaluated to?  I
don't have K&R handy, but I believe it says long ints.

Eric
ericco@ssl.berkeley.edu

Eric
ericco@ssl.berkeley.edu