Can anyone explain logic of the above code ?
*Muthuraj R
IV th Year , ISE
PESIT , Bangalore*
On Sun, Aug 28, 2011 at 2:16 AM, Dheeraj Sharma <dheerajsharma1...@gmail.com
> wrote:
> yeah..dat we all know..bt wat actually this code is doing..this is wat am
> thinking!!!
>
>
> On Sun, Aug 28, 2011 at 2:12 AM, Debabrata Das <
> debabrata.barunhal...@gmail.com> wrote:
>
>> Another approach!!
>>
>> while(x)
>> {
>> x=x&(x-1);
>> count++;
>>
>> }
>>
>> On Sun, Aug 28, 2011 at 2:26 PM, Nikhil Gupta
>> <nikhilgupta2...@gmail.com>wrote:
>>
>>> Here is a small piece of program which counts the number of bits set in a
>>> number. I found it online somewhere.
>>> InputOutput00(0000000)52(0000101)73(0000111)
>>>
>>> *int* CountBits (*unsigned* *int* x )
>>>
>>>
>>>
>>>
>>> {
>>> *static* *unsigned* *int* mask[] *=* { 0x55555555,
>>>
>>>
>>>
>>>
>>> 0x33333333,
>>> 0x0F0F0F0F,
>>> 0x00FF00FF,
>>>
>>>
>>>
>>>
>>> 0x0000FFFF } ;
>>> *int* i ;
>>> *int* shift ; /* Number of positions to shift to right*/
>>> *for* ( i *=*0, shift *=*1; i *<* 5; i *++*, shift **=* 2)
>>>
>>>
>>>
>>>
>>> x *=* (x *&* mask[i ])*+* ( ( x *>>* shift) *&* mask[i]);
>>>
>>>
>>>
>>>
>>> *return* x;
>>> }
>>>
>>> Can anyone explain how this is working?
>>>
>>> --
>>> Nikhil Gupta
>>> Senior Co-ordinator, Publicity
>>> CSI, NSIT Students' Branch
>>> NSIT, New Delhi, India
>>>
>>> --
>>> 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.
>>
>
>
>
> --
> *Dheeraj Sharma*
> Comp Engg.
> NIT Kurukshetra
> +91 8950264227
>
>
> --
> 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.
