Why my code is returning + 2 bits for every input except 0

#1

code- https://ide.codingblocks.com/s/233924

#2

i have added fast count and it is not working too code- https://ide.codingblocks.com/s/233933

#3

For Basic Apprach

it will depend on system
if you write

 while(i<32){
        if( n & n<<i){
            ans++;
        }
        i++;
    }

it will run

if int is 64 bit only then your code will give correct output

#4

what about fast count??

#5

in fast count you have done
n&n-1 n&n-2 n&n-3 till n&n-i is not zero

which is not correct what you have to do is
n=n&n-1;
so that every time n and n-1 both will update
for Ex n=13, n-1=12

  1. n=n&n-1 so n=13&12=12
  2. n=12&11=8
    3)n=8&7=0

so ans is 3 as 3 iteration required
in this way you have to do

i hope you understand

if you have more doubts regarding this feel free to ask
and if your doubt is resolved please mark it as resolved from your doubt section in your course

#6

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