@aditya
actually first see your post, you have written o/p=24 accordingly padding
done is perfect. But actually its printing 16.
So now question arises of padding
and its pareek not prateek :)
On Mon, Jul 18, 2011 at 12:38 AM, aditya kumar <aditya.kumar130...@gmail.com
> wrote:
> @prateek . can you explain me ?? i dint get padding logic in this example
> of mine.
>
> On Mon, Jul 18, 2011 at 12:30 AM, sagar pareek <sagarpar...@gmail.com>wrote:
>
>> sizeof long double is 12. So padding concept is perfectly working
>>
>>
>> On Mon, Jul 18, 2011 at 12:26 AM, aditya kumar <
>> aditya.kumar130...@gmail.com> wrote:
>>
>>> struct st
>>> {
>>> char ch1;
>>> long double ld;
>>> }s;
>>> printf("%d",sizeof(s));
>>> //output : 24 (for 32-bit compiler)
>>> ->as i have mentioned above the behaviour is undefined in case of sizeof
>>> (struct)
>>> can any one explain me why the padding concept does not work here ??
>>>
>>> On Mon, Jul 18, 2011 at 12:13 AM, Parthiban <jega...@gmail.com> wrote:
>>>
>>>> @Abhi:
>>>> Answers:
>>>> 1. whenever a 'const' qualifier is added previously to a variable
>>>> declaration it means that the value of the variable is automatically
>>>> initialized to '0'(because of the 'auto' type of the const variable) and
>>>> cannot be changed in any of the following assignment statements to the
>>>> const
>>>> variable.
>>>>
>>>> 2.
>>>> Here for the structure struct s1 since the entire structure is ending
>>>> within 8 bytes no padding is done which means
>>>> s1: [char a]
>>>> 1byte
>>>> but for the structure struct s2 consider the following:
>>>> s2: [ char a
>>>> 1byte
>>>> ------ int a-------
>>>> ------4bytes----]
>>>> so here the concept of padding comes to make all the variable aligned in
>>>> even boundaries and so the structure after aligning will look as:
>>>> s2: [ ------ char b----
>>>> ------4byte-----
>>>> ------ int a-------
>>>> ------4bytes----]
>>>>
>>>> so the size of strcut s2 will be 8bytes..........
>>>>
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>>>
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>>
>>
>>
>> --
>> **Regards
>> SAGAR PAREEK
>> COMPUTER SCIENCE AND ENGINEERING
>> NIT ALLAHABAD
>>
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**Regards
SAGAR PAREEK
COMPUTER SCIENCE AND ENGINEERING
NIT ALLAHABAD
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