man this is too big of a page to go thru... so tell as both (OS nd pro) are 64 bit why is ptr size 4 bytes? nd also does it depend on all 3 : OS, processor, compiler ?
Shashank Jain IIIrd year Computer Engineering Delhi College of Engineering On Thu, Aug 4, 2011 at 11:57 AM, Dipankar Patro <[email protected]> wrote: > there absolutely nothing wrong in your interpretation. > here is a link that might help : > http://www.unix.org/whitepapers/64bit.html > > > On 4 August 2011 11:18, Shashank Jain <[email protected]> wrote: > >> see dipankar, i hv 64 bit OS nd processor bt i dont know abt the compiler. >> nd yeah size of int is 4 bytes. so tell me where im interpreting wrong? >> >> Shashank Jain >> 3rd year, Computer Engg. >> Delhi College of Engineering >> >> >> >> On Thu, Aug 4, 2011 at 11:16 AM, Dipankar Patro <[email protected]>wrote: >> >>> This has been a hot topic of discussion for a long time. But I found >>> there are two things to look into it: >>> >>> 1. a 64 bit OS is one, which has 64 bit address handling capacity. and a >>> 64bit processor is one which can perform operations on 64 bit data. A >>> general concept that actually gets overlooked by many. Even I was confused >>> with differences of 64 bit OS and Processors a while back. >>> >>> 2. if a compiler by it's own doesn't support 64 bit, it might be the case >>> that even if you run on a 64 bit OS, size of int will be 4 bytes (32 bit). >>> >>> I think the best way to check out is to make a code on 64 bit compiler. >>> If somebody has tried it please share the results. >>> >>> On 4 August 2011 10:38, Tushar Bindal <[email protected]> wrote: >>> >>>> never assume that he compiler is same as the OS you run. it may be that >>>> you are running a 32-bit compiler >>>> >>>> I think pointers have size 4bytes on 8 byte compiler also - not sure. >>>> someone please correct me. >>>> >>>> >>>> On Thu, Aug 4, 2011 at 10:26 AM, Shashank Jain <[email protected]>wrote: >>>> >>>>> the size of a pointer is showing 4 bytes in my 64-bit OS, which should >>>>> have been 8 bytes. Correct me where i am wrong? >>>>> >>>>> Shashank Jain >>>>> 3rd year, Computer Engg. >>>>> Delhi College of Engineering >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Algorithm Geeks" group. >>>>> To post to this group, send email to [email protected]. >>>>> To unsubscribe from this group, send email to >>>>> [email protected]. >>>>> 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 : [email protected] >>>> 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 [email protected]. >>>> To unsubscribe from this group, send email to >>>> [email protected]. >>>> For more options, visit this group at >>>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>> >>> >>> >>> -- >>> >>> ___________________________________________________________________________________________________________ >>> >>> Please do not print this e-mail until urgent requirement. Go Green!! >>> Save Papers <=> Save Trees >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> 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 [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > > ___________________________________________________________________________________________________________ > > Please do not print this e-mail until urgent requirement. Go Green!! > Save Papers <=> Save Trees > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
