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Re: Pointers and Sequence Point

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On 05/02/2011 12:36 PM, Chad wrote:
> On May 2, 6:58�am, Martin Ambuhl <mamb...@earthlink.net> wrote:
>> On 5/2/2011 7:38 AM, arnuld wrote:
>>
>>> I have this program which is causing confusion to me. I am told that last
>>> printf() of main() will always print "Second", not "First". I think line:
>>
>>> � x = myAlloc(x);
>>
>> While it is possible to write evil code in which myAlloc could modify x,
>> in C myAlloc receives a copy of the value of x and has no clue where x
>> is or how to modify it. �There are not two or more instances of
>> modifying x between sequence points.
>>
> 
> What is the scope of 'x' in myAlloc(x)? Is confined to myAlloc()?

The scope of 'x' starts at the declaration of 'x' on the first line of
main(), and is restricted to the body of main(). It goes out of scope
throughout the execution of myAlloc(). It comes back into scope after
that function returns. It's scope ends when main() returns.

-- 
James Kuyper

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Pointers and Sequence Point arnuld <sunrise@invalid.address> - 2011-05-02 11:38 +0000
  Re: Pointers and Sequence Point James Kuyper <jameskuyper@verizon.net> - 2011-05-02 08:23 -0400
  Re: Pointers and Sequence Point Martin Ambuhl <mambuhl@earthlink.net> - 2011-05-02 09:58 -0400
    Re: Pointers and Sequence Point Chad <cdalten@gmail.com> - 2011-05-02 09:36 -0700
      Re: Pointers and Sequence Point Angel <angel+news@spamcop.net> - 2011-05-02 17:21 +0000
      Re: Pointers and Sequence Point James Kuyper <jameskuyper@verizon.net> - 2011-05-02 23:20 -0400
        Re: Pointers and Sequence Point Keith Thompson <kst-u@mib.org> - 2011-05-02 23:26 -0700
          Re: Pointers and Sequence Point James Kuyper <jameskuyper@verizon.net> - 2011-05-03 05:33 -0400
    Re: Pointers and Sequence Point Kenneth Brody <kenbrody@spamcop.net> - 2011-05-02 13:35 -0400
      Re: Pointers and Sequence Point Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2011-05-03 17:45 +0300
  Re: Pointers and Sequence Point John Bode <jfbode1029@gmail.com> - 2011-05-02 10:17 -0700
  Re: Pointers and Sequence Point Tim Rentsch <txr@alumni.caltech.edu> - 2011-05-02 10:31 -0700
  Re: Pointers and Sequence Point "Morris Keesan" <mkeesan@post.harvard.edu> - 2011-05-02 20:55 -0400
    Re: Pointers and Sequence Point David Resnick <lndresnick@gmail.com> - 2011-05-03 08:01 -0700

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