Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int mask = 0;
    int a = 0;
    for( int i = 0 ; i < 32 ; i++ ){
        mask = n >> i ;
        if( mask & 0x1){
            a++;
        }
    }
    return a;
}

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

Solving Approach