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NNTP-Posting-Date: Tue, 17 Jul 2012 21:31:37 -0500
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Date: Tue, 17 Jul 2012 22:31:34 -0400
From: pete <pfiland@mindspring.com>
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Subject: Re: Precedence Misunderstanding
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Xref: csiph.com comp.lang.c:23353

Charles Richmond wrote:
 
> I can *not* understand how "&&" 
> can have a higher precedence than "||"...
> when it seems to make *no* difference in *any* expression I've seen.

Here's a counter example, which shows that 
    a || b  && c
is different from    
   (a || b) && c


/* BEGIN new.c output */

a

ac

/* END new.c output */




/* BEGIN new.c */

#include <stdio.h>

#define a  printf("a") 
#define b (printf("b") - 1)
#define c    puts("c")

int 
main(void)
{
    puts("/* BEGIN new.c output */\n");

     a || b  && c;

     puts("\n");

    (a || b) && c;

    puts("\n/* END new.c output */\n");
    return 0;
}



/* END new.c */

-- 
pete