Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...

what is the purpose of the code, and is there any problem
with it.
bool f( uint n )
{ return (n & (n-1)) == 0; }

Answer Posted / c.p.senthil

function returns if the number is a power of 2. if number value is 1, 2, 4, 8, 16 ... then TRUE is returned.

f(1) => 1 & 0 => 0001 & 0000 => 0
f(2) => 2 & 1 => 0010 & 0001 => 0
f(3) => 3 & 2 => 0011 & 0010 => 1 (non zero) => return true
f(4) => 4 & 3 => 0100 & 0011 => 0
f(5) => 5 & 4 => 0101 & 0100 => 4 (non zero) => return true
f(6) => 6 & 5 => 0110 & 0101 => 4 (non zero) => return true
f(7) => 7 & 6 => 0111 & 0110 => 6 (non zero) => return true
f(8) => 8 & 7 => 1000 & 0111 => 0

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what is the height of tree if leaf node is at level 3. please explain

2088


find the output? void r(int a[],int c, int n) { if(c>n) { a[c]=a[c]+c; r(a,++c,n); r(a,++c,n); } } int main() { int i,a[5]={0}; r(a,0,5); for(i=0;i<5;i++) printf("\n %d",a[i]); getch(); }

2262


What do you mean by a local block?

1027


What is difference between class and structure?

1064


What is auto keyword in c?

1160


What are the advantages of c language?

1042


how many errors in c explain deply

2036


what is the difference between 123 and 0123 in c?

1157


What does %p mean c?

1017


Explain high-order and low-order bytes.

1049


What are the 5 organizational structures?

970


What is assert and when would I use it?

963


How to throw some light on the b tree?

1021


How can I invoke another program or command and trap its output?

1046


Why do we need volatile in c?

1118