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Groups > comp.lang.c > #9160

Re: Is there a shorter solution ?

From blp@cs.stanford.edu (Ben Pfaff)
Newsgroups comp.lang.c
Subject Re: Is there a shorter solution ?
Date 2011-08-10 10:17 -0700
Message-ID <87k4alnq2p.fsf@blp.benpfaff.org> (permalink)
References <f5a3d4b3-e101-44c1-921d-6c546b1e2f78@d7g2000vbv.googlegroups.com> <27445c82-9386-477b-a686-09658ce156f8@n35g2000yqf.googlegroups.com> <2e70f5da-2af5-4a9c-a6f7-047288cf670d@y8g2000prd.googlegroups.com> <j1udcm$p6l$1@dont-email.me> <1932f584-f7d2-4cfe-84ae-2bb4cac93521@a2g2000prf.googlegroups.com>

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HumbleWorker <amardeep.developer@gmail.com> writes:

> On Aug 10, 9:57 pm, James Kuyper <jameskuy...@verizon.net> wrote:
>> On 08/10/2011 12:51 PM, HumbleWorker wrote:
>>
>> > On Aug 10, 9:43 pm, tom st denis <t...@iahu.ca> wrote:
>> >> On Aug 6, 1:25 pm, HumbleWorker <amardeep.develo...@gmail.com> wrote:
>>
>> >> int main()
>> >> {
>> >>    char *k = "abababababawhatever";
>> >>    while(*k) numA += *k++ == 'a';
>> >>    printf("Number of a's = %d\n", numA);
>> >>    return 0;
>>
>> >> }
>>
>> >> :-)
>>
>> > Thanks ! Is it guaranteed that a logical true returns 1 ?
>>
>> All logical expressions in C indicate truth by having a result of 1.
>
> As we have know that any non-zero int evaluates to logical true, so
> vice-versa doesn't a compiler have the freedom to return anything non-
> zero ? Is there some standard that enforces that it should be 1 only ?

Yes, the C standard says so, e.g.:

     6.5.13 Logical AND operator

     The && operator shall yield 1 if both of its operands
     compare unequal to 0; otherwise, it yields 0. The result has
     type int.

...

     6.5.14 Logical OR operator

     The || operator shall yield 1 if either of its operands
     compare unequal to 0; otherwise, it yields 0. The result has
     type int.

-- 
char a[]="\n .CJacehknorstu";int putchar(int);int main(void){unsigned long b[]
={0x67dffdff,0x9aa9aa6a,0xa77ffda9,0x7da6aa6a,0xa67f6aaa,0xaa9aa9f6,0x11f6},*p
=b,i=24;for(;p+=!*p;*p/=4)switch(0[p]&3)case 0:{return 0;for(p--;i--;i--)case+
2:{i++;if(i)break;else default:continue;if(0)case 1:putchar(a[i&15]);break;}}}

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Thread

Is there a shorter solution ? HumbleWorker <amardeep.developer@gmail.com> - 2011-08-06 10:25 -0700
  Re: Is there a shorter solution ? Ike Naar <ike@sdf.lonestar.org> - 2011-08-06 17:42 +0000
  Re: Is there a shorter solution ? John Gordon <gordon@panix.com> - 2011-08-06 17:44 +0000
    Re: Is there a shorter solution ? Kenneth Brody <kenbrody@spamcop.net> - 2011-08-08 09:47 -0400
      Re: Is there a shorter solution ? Keith Thompson <kst-u@mib.org> - 2011-08-08 08:09 -0700
        Re: Is there a shorter solution ? HumbleWorker <amardeep.developer@gmail.com> - 2011-08-10 07:20 -0700
  Re: Is there a shorter solution ? tom st denis <tom@iahu.ca> - 2011-08-10 09:43 -0700
    Re: Is there a shorter solution ? HumbleWorker <amardeep.developer@gmail.com> - 2011-08-10 09:51 -0700
      Re: Is there a shorter solution ? James Kuyper <jameskuyper@verizon.net> - 2011-08-10 12:57 -0400
        Re: Is there a shorter solution ? HumbleWorker <amardeep.developer@gmail.com> - 2011-08-10 10:13 -0700
          Re: Is there a shorter solution ? blp@cs.stanford.edu (Ben Pfaff) - 2011-08-10 10:17 -0700
            Re: Is there a shorter solution ? HumbleWorker <amardeep.developer@gmail.com> - 2011-08-10 10:29 -0700
              Re: Is there a shorter solution ? tom st denis <tom@iahu.ca> - 2011-08-10 11:29 -0700
                Re: Is there a shorter solution ? "J. J. Farrell" <jjf@bcs.org.uk> - 2011-08-11 03:02 +0100
            Re: Is there a shorter solution ? Kenneth Brody <kenbrody@spamcop.net> - 2011-08-12 11:39 -0400
              Re: Is there a shorter solution ? Keith Thompson <kst-u@mib.org> - 2011-08-12 09:06 -0700
          Re: Is there a shorter solution ? James Kuyper <jameskuyper@verizon.net> - 2011-08-10 14:00 -0400
          Re: Is there a shorter solution ? Seebs <usenet-nospam@seebs.net> - 2011-08-11 01:46 +0000
        Re: Is there a shorter solution ? Keith Thompson <kst-u@mib.org> - 2011-08-10 11:49 -0700
          Re: Is there a shorter solution ? James Kuyper <jameskuyper@verizon.net> - 2011-08-10 15:03 -0400
            Re: Is there a shorter solution ? Keith Thompson <kst-u@mib.org> - 2011-08-10 13:23 -0700
      Re: Is there a shorter solution ? gordonb.d3r7p@burditt.org (Gordon Burditt) - 2011-08-10 18:15 -0500
    Re: Is there a shorter solution ? HumbleWorker <amardeep.developer@gmail.com> - 2011-08-10 11:26 -0700
      Re: Is there a shorter solution ? James Kuyper <jameskuyper@verizon.net> - 2011-08-10 15:14 -0400

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