Sorry guys, int is 4 bytes on 64 bit and 2 bytes on 32 bit system.. But padding rule remains same for both structures as mentioned above...
On 8/6/11, Puneet Gautam <puneet.nsi...@gmail.com> wrote: > There is no difference between the two... > > On 32 bit system, both structures need every address location where > int and pointer are stored to be a multiple of 4(highest size is 4).. > > On 64 bit, > even if pointer is 4bytes(say, in 64 bit system), and p1, p2 be > structure variables, then p2 should start at address which is multiple > of 8 as int data is 8bytes. So, if p1 starts at 0, it should end at 16 > not 12 so that p2 starts at 8's multiple. > > This is done by padding pointer by 4bytes in both I and II struct. > declarations. > > > Hope i made it clear...! > > Thanks. > > > > > On 8/6/11, Tushar Bindal <tushicom...@gmail.com> wrote: >> http://www.serc.iisc.ernet.in/ComputingFacilities/systems/cluster/xlf/html/xlfug/ug35.htm >> this says int is always 4 bytes and pointer is 8 bytes on 64 bit >> compiler. >> >> so how does padding affect these structures because of the difference in >> size of int and pointer? >> >> >> I tried this program >> https://ideone.com/CRU6x#view_edit_box >> char always gets 4 bytes whenever it has int or double in the same struct >> irrrespctive of the order of the declaration of variables. >> I thought char should get size 8 when there is a double in the ame struct >> whereas it gets size 4 only. >> what is the problem here? >> >> On Sat, Aug 6, 2011 at 4:40 AM, Shashank Jain <shashan...@gmail.com> >> wrote: >> >>> i dont understand the diff btw dem, could u plz elaborate? >>> >>> Shashank Jain >>> IIIrd year >>> Computer Engineering >>> Delhi College of Engineering >>> >>> >>> >>> On Sat, Aug 6, 2011 at 12:32 AM, Kamakshii Aggarwal >>> <kamakshi...@gmail.com >>> > wrote: >>> >>>> in case of 64 bit, >>>> size of second structure will also be 16 not 8 >>>> >>>> >>>> On Fri, Aug 5, 2011 at 11:40 PM, UTKARSH SRIVASTAV < >>>> usrivastav...@gmail.com> wrote: >>>> >>>>> I think voth are just same.................. >>>>> >>>>> >>>>> On Fri, Aug 5, 2011 at 10:57 AM, priya v <pria....@gmail.com> wrote: >>>>> >>>>>> in case of 64 bit machine y doesn't padding happen in the 2nd >>>>>> structure? >>>>>> >>>>>> >>>>>> On Fri, Aug 5, 2011 at 11:21 PM, hary rathor >>>>>> <harry.rat...@gmail.com>wrote: >>>>>> >>>>>>> no ,if u r using 32 bit machine . that will use 4 byte pointer size >>>>>>> , >>>>>>> but in 64 machine that enforce to be size of 8 . where padding >>>>>>> will >>>>>>> take int your given first structure >>>>>>> >>>>>>> so for 32 bit- size will 8 8 for both structure >>>>>>> for 64 bit - size will 16 and 12 respectively cause of 4 bit padding >>>>>>> in >>>>>>> one structure >>>>>>> >>>>>>> hence 2nd structure is good for use >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "Algorithm Geeks" group. >>>>>>> To post to this group, send email to algogeeks@googlegroups.com. >>>>>>> To unsubscribe from this group, send email to >>>>>>> algogeeks+unsubscr...@googlegroups.com. >>>>>>> For more options, visit this group at >>>>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>>>> >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Algorithm Geeks" group. >>>>>> To post to this group, send email to algogeeks@googlegroups.com. >>>>>> To unsubscribe from this group, send email to >>>>>> algogeeks+unsubscr...@googlegroups.com. >>>>>> For more options, visit this group at >>>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> *UTKARSH SRIVASTAV >>>>> CSE-3 >>>>> B-Tech 2nd Year >>>>> @MNNIT ALLAHABAD* >>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups >>>>> "Algorithm Geeks" group. >>>>> To post to this group, send email to algogeeks@googlegroups.com. >>>>> To unsubscribe from this group, send email to >>>>> algogeeks+unsubscr...@googlegroups.com. >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>> >>>> >>>> >>>> >>>> -- >>>> Regards, >>>> Kamakshi >>>> kamakshi...@gmail.com >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups >>>> "Algorithm Geeks" group. >>>> To post to this group, send email to algogeeks@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> algogeeks+unsubscr...@googlegroups.com. >>>> For more options, visit this group at >>>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to algogeeks@googlegroups.com. >>> To unsubscribe from this group, send email to >>> algogeeks+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> >> >> -- >> Tushar Bindal >> Computer Engineering >> Delhi College of Engineering >> Mob: +919818442705 >> E-Mail : tushicom...@gmail.com >> Website: www.jugadengg.com >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algogeeks@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> >> > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. 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