Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {

    unsigned int index = 0;
    unsigned int x = 0;
    while(n > 0)
    {
      if(n & 1)
      {
        x++;
      } 
      n = n >> 1;
    }
    return  x;
}

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

Solving Approach