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From: bj@cbmvax.commodore.com (Brian Jackson)
Newsgroups: comp.sys.amiga,comp.sys.amiga.tech
Subject: Re: "chip" in SAS C
Message-ID: <17211@cbmvax.commodore.com>
Date: 8 Jan 91 04:04:59 GMT
References: <1991Jan4.031246.20044@cs.uoregon.edu> <1991Jan6.092515.6970@cs.uoregon.edu> <12545@hacgate.UUCP>
Reply-To: bj@cbmvax.commodore.com (Brian Jackson)
Organization: Commodore, West Chester, PA
Lines: 39

In article <12545@hacgate.UUCP> johnl@SDFSUN1.hac.com (John Lee) writes:
>In article <1991Jan6.092515.6970@cs.uoregon.edu> rlittle@cs.uoregon.edu (Robert A. Little) writes:
>>Two things...First: I mistyped the message--my code read:
>>
>>USHORT chip ImageData[]={0xF7000,0xEFFF,...};
>>
>>Second:
>>The compiler would only compile the code if I moved it from within a procedure
>>to a global declaration...it compiles fine now...my only question is, Why?
>>Why won't it compile if the declaration is made within a procedure?  Some type
>>of a scope problem?
>
>Aha!  There's the rub...  You cannot initialize aggregate automatic variables.
>You'll need to make it static by:  1) moving it outside the procedure, making
>it global, or 2) inserting the storage class keyword 'static' in front.

ANSI C allows the initialization of aggregate auto variables as long
as the initializers are constants (which these are.)  See pages 85-86
and page 219 of the second edition K&R.  Of course, the 'chip' keyword
in SAS C makes this a bit unlikely, but the ANSI C compilers should
accept it. The following compiles and runs just fine with Aztec 5.0d:

main()
{
    int foo[] = { 0,1,2,3 } ;
    int x ;

    for( x = 0 ; x < 4 ; x++ )
        printf("x = %d\n", foo[x] ) ;
}
 

bj

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 | Brian Jackson  Software Engineer, Commodore-Amiga Inc.  GEnie: B.J. |
 | bj@cbmvax.cbm.commodore.com    or  ...{uunet|rutgers}!cbmvax!bj     |
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