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From:	Martin Ambuhl <mambuhl AT earthlink DOT net>
Organization:	Nocturnal Aviation
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGPP: #define problems
References:	<daed704d DOT 0112271423 DOT 309fcdeb AT posting DOT google DOT com>
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Date:	Fri, 28 Dec 2001 06:03:39 GMT
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Matt wrote:
> 
> Hi All,
> 
> I have am having a problem with the way #define's are being handled. I
> have some sample code to demonstrate the problem.

Your code is broken.  See the following:


#include <stdio.h>

 /* mha - your defines */
#define BASEVAL1    233
#define BASEVAL2    BASEVAL1 + 29
#define BASEVAL3    233
#define BASEVAL4    BASEVAL1 + 57

 /* mha - my defines */
#define MHAVAL1    233
#define MHAVAL2    (MHAVAL1 + 29)
#define MHAVAL3    233
#define MHAVAL4    (MHAVAL1 + 57)

int main(void)
{
    /* mha - code using your defines */
    printf("baseval1 [233] = %d\n", BASEVAL1);
    printf("baseval2 [262] = %d\n", BASEVAL2);
    printf("baseval3 [233] = %d\n", BASEVAL3);
    printf("baseval4 [290] = %d\n", BASEVAL4);
    printf("baseval4 - baseval2 [28] = %d\n", BASEVAL4 - BASEVAL2);
    printf("290 - 262 [28] = %d\n\n", 290 - 262);
    /* mha - code using my defines */
    printf("mhaval1 [233] = %d\n", MHAVAL1);
    printf("mhaval2 [262] = %d\n", MHAVAL2);
    printf("mhaval3 [233] = %d\n", MHAVAL3);
    printf("mhaval4 [290] = %d\n", MHAVAL4);
    printf("mhaval4 - mhaval2 [28] = %d\n", MHAVAL4 - MHAVAL2);
    printf("290 - 262 [28] = %d\n\n", 290 - 262);
    return 0;
}

baseval1 [233] = 233
baseval2 [262] = 262
baseval3 [233] = 233
baseval4 [290] = 290
baseval4 - baseval2 [28] = 86
290 - 262 [28] = 28

mhaval1 [233] = 233
mhaval2 [262] = 262
mhaval3 [233] = 233
mhaval4 [290] = 290
mhaval4 - mhaval2 [28] = 28
290 - 262 [28] = 28

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