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Re: Questions Regarding Null and Casting

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On 06/ 4/11 10:13 AM, Ian Collins wrote:
> On 06/ 4/11 09:52 AM, BigChuck19 wrote:
>> My textbook asserts that when checking if sufficient memory was allocated
>> for a
>> dynamic variable using malloc(), a test should be made to determine
>> whether
>> sufficient memory was actually allocated.  I understand the concept of
>> checking
>> if the memory was allocated; the code confuses me, however.  E.g., a
>> fragment
>> of code from the book is:
>>
>> grades = (int *) malloc(numgrades * sizeof(int));
>
> grades = malloc(numgrades * sizeof(*)grades);

Oops,

grades = malloc(numgrades * sizeof(*grades));

or

grades = malloc(numgrades * sizeof *grades);

> Would have been better.

-- 
Ian Collins

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Questions Regarding Null and Casting BigChuck19 <bc19@mailinator.com> - 2011-06-03 21:52 +0000
  Re: Questions Regarding Null and Casting Ian Collins <ian-news@hotmail.com> - 2011-06-04 10:13 +1200
    Re: Questions Regarding Null and Casting Ian Collins <ian-news@hotmail.com> - 2011-06-04 10:16 +1200
  Re: Questions Regarding Null and Casting Keith Thompson <kst-u@mib.org> - 2011-06-03 15:25 -0700
    Re: Questions Regarding Null and Casting Tim Rentsch <txr@alumni.caltech.edu> - 2011-06-03 20:45 -0700
  Re: Questions Regarding Null and Casting pete <pfiland@mindspring.com> - 2011-06-03 18:38 -0400
  Re: Questions Regarding Null and Casting Angel <angel+news@spamcop.net> - 2011-06-03 23:23 +0000
    Re: Questions Regarding Null and Casting Keith Thompson <kst-u@mib.org> - 2011-06-03 17:24 -0700
  Re: Questions Regarding Null and Casting "J. J. Farrell" <jjf@bcs.org.uk> - 2011-06-04 00:45 +0100
  Re: Questions Regarding Null and Casting Keith Thompson <kst-u@mib.org> - 2011-06-03 17:27 -0700
  Re: Questions Regarding Null and Casting pete <pfiland@mindspring.com> - 2011-06-03 21:12 -0400
  Re: Questions Regarding Null and Casting Shao Miller <sha0.miller@gmail.com> - 2011-06-06 20:11 -0500

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