@Nikhil
thnks :)
On Mon, Jul 18, 2011 at 1:32 AM, Nikhil Gupta <nikhilgupta2...@gmail.com>wrote:
> That is again compiler dependent. Usually when hardware configuration is
> taken into account, the compiler uses padding of 3 bytes. But in some cases,
> for the ease of hardware access and faster implementation, 11 bytes are
> padded. Possibly depends on your system hardware's synchronization with the
> compiler.
>
>
> On Mon, Jul 18, 2011 at 1:27 AM, aditya kumar <
> aditya.kumar130...@gmail.com> wrote:
>
>> @Nikhil
>> why is Address of long double : starts at 11 address locations from char
>> variable ??
>> is shud start from 3rd adress location from char variable bcoz memory
>> cycle involves a word so are you padding 11bytes ??
>>
>>
>> On Mon, Jul 18, 2011 at 1:24 AM, Nikhil Gupta
>> <nikhilgupta2...@gmail.com>wrote:
>>
>>> @Sagar
>>>
>>> Memory sizes of long double variables are compiler and system
>>> configuration dependent. So obviously, in accordance with your compiler, the
>>> size of long double is 8 bytes.
>>>
>>>
>>> On Mon, Jul 18, 2011 at 1:22 AM, Nikhil Gupta <nikhilgupta2...@gmail.com
>>> > wrote:
>>>
>>>> @Aditya
>>>>
>>>> Here is the padding effect :
>>>>
>>>> Address of char : starts anywhere
>>>> Address of long double : starts at 11 address locations from char
>>>> variable --> 1+11+12=24 bytes
>>>>
>>>>
>>>> On Mon, Jul 18, 2011 at 1:10 AM, sagar pareek <sagarpar...@gmail.com>wrote:
>>>>
>>>>> @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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>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> **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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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Nikhil Gupta
>>>> Senior Co-ordinator, Publicity
>>>> CSI, NSIT Students' Branch
>>>> NSIT, New Delhi, India
>>>>
>>>>
>>>
>>>
>>> --
>>> Nikhil Gupta
>>> Senior Co-ordinator, Publicity
>>> CSI, NSIT Students' Branch
>>> NSIT, New Delhi, India
>>>
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>
>
>
> --
> Nikhil Gupta
> Senior Co-ordinator, Publicity
> CSI, NSIT Students' Branch
> NSIT, New Delhi, India
>
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