Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int pos=31,count;
    for(pos=31,count=0;pos>=0;pos--) //checking set and clear bit
    {
      if(n>>pos&1)
      count++;
    }
    return count;
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", countSetBits(n));
    return 0;
}

Solving Approach