@Amit: This gives, e.g., reverse(26) as 36 rather than 62.
Dave
On Aug 25, 9:28 am, amit kannaujiya <amitkannaujiyan...@gmail.com>
wrote:
> int reverse(int n)
> {
> int i=9*( abs(n/10 - n%10) );
> return i;
>
>
>
> }
> On Wed, Aug 24, 2011 at 9:56 PM, Dave <dave_and_da...@juno.com> wrote:
> > @Anika: So you want to reverse the digits of the decimal
> > representation of a number. Extracting decimal digits requires
> > division and modulus by 10. Normally this is done by division, but as
> > a different recent thread has shown, division can be accomplished by
> > bit operations, comparisons, and subtraction.
>
> > This is the kind of computation you should go through to reverse the
> > decimal digits of a number...
>
> > int reverse( int n );
> > {
> > int i = 0;
> > while( n )
> > {
> > i = i * 10 + n % 10;
> > n /= 10;
> > }
> > return i;
> > }
>
> > Now, if you want, you can dig though the other postings for the
> > division algorithm. A simple modification of that algorithm can return
> > the modulus (remainder) instead of or in addition to the quotient.
> > Multiplication by 10 can be done with bit operations as i << 3 + i <<
> > 1.
>
> > Dave
>
> > On Aug 11, 12:57 pm, Anika Jain <anika.jai...@gmail.com> wrote:
> > > reverse of a no. means.. reverse of 39 is 93..
> > > but i dont get it how can we reverse a no. by bitwise operator...
>
> > > On Thu, Aug 11, 2011 at 11:11 PM, manvir siyo <manis...@gmail.com>
> > wrote:
> > > > please tell me abt the pattern of de shaw company..
> > > > please
>
> > > > On Thu, Aug 11, 2011 at 11:06 PM, paul suganthan <
> > paul.sugant...@gmail.com
> > > > > wrote:
>
> > > >> You are trying to reverse the bits. not the number.
> > > >> This will not work for bits also!
>
> > > >> If given input is 1101 0011
> > > >> you will get
> > > >> 0010 1100
>
> > > >> On Thu, Aug 11, 2011 at 11:01 PM, Naren s <sweetna...@gmail.com>
> > wrote:
>
> > > >>> not 100% sure if this is what you are asking for but here it goes.
>
> > > >>> you have a number 11110000 (binary) and you want 00001111 (binary)?
>
> > > >>> you want to use the xor operator ^
>
> > > >>> value = 0xf0; //11110000 binary
> > > >>> printf("before %d\n");
> > > >>> value ^= 0xff; //11111111 binary
> > > >>> printf("after%d\n");
>
> > > >>> output:
> > > >>> before 240
> > > >>> after 15
>
> > > >>> 240 in binary is 11110000
> > > >>> 15 in binary is 00001111
>
> > > >>> <
> >http://wiki.answers.com/Q/How_do_you_reverse_a_number_using_bitwise_o...>
>
> > > >>> On Thu, Aug 11, 2011 at 10:43 PM, Rajeshwar Patra <
> > > >>> rajeshwarpa...@gmail.com> wrote:
>
> > > >>>> how can we reverse a number using bitwise operators?
>
> > > >>>> --
> > > >>>> *Rajeshwar Patra,*
> > > >>>> *MCA final year,*
> > > >>>> *Nit Durgapur*
>
> > > >>>> --
> > > >>>> 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.
>
> > > >>> --
> > > >>> *Narayanan S,*
> > > >>> B.E., C.S.E., (final year),
> > > >>> College Of Engineering Guindy,
> > > >>> Anna University,
> > > >>> Chennai-25.
>
> > > >>> --
> > > >>> 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.
>
> > > > --
> > > > 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.-Hide quoted text -
>
> > > - Show quoted text -
>
> > --
> > 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.- Hide quoted text -
>
> - Show quoted text -
--
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.
