Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int i=0,a;
    while(n){
       a=n & 1;
       if(a==1){
        i++;
       }
       n=(n>>1);
    }
return i;
    }


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

Solving Approach