CareerCup

int a = 500;
//Take the first byte of this integer
char *b = (char *)a;
int c = (int)*b;

//Now c will have the first byte of a
//count the number of bits that are set

while(c !=0)
{
c = c & (c -1);
count++;
}

return count;

#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a=100,count=0,i=0;
for(;i<16;i++)
{

if(a&1==1)
count++;
a=a>>1;
}
cout<<count;
getch();
}

I have tried both.But i dint get the proper output

// C program to Count set 
// bits in an integer  
#include <stdio.h>        
  
/* Function to get no of set bits in binary 
   representation of positive integer n */
unsigned int countSetBits(unsigned int n) 
{ 
  unsigned int count = 0; 
  while (n) 
  { 
    count += n & 1; 
    n >>= 1; 
  } 
  return count; 
} 
  
/* Program to test function countSetBits */
int main() 
{ 
    int i = 9; 
    printf("%d", countSetBits(i)); 
    return 0; 
}

// C program to Count set 
// bits in an integer  
#include <stdio.h>        
  
/* Function to get no of set bits in binary 
   representation of positive integer n */
unsigned int countSetBits(unsigned int n) 
{ 
  unsigned int count = 0; 
  while (n) 
  { 
    count += n & 1; 
    n >>= 1; 
  } 
  return count; 
} 
  
/* Program to test function countSetBits */
int main() 
{ 
    int i = 9; 
    printf("%d", countSetBits(i)); 
    return 0; 
}