Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int set_bit_counter = 0;

    while (n) {
        if (n & (1U<<0)) set_bit_counter++;
        n = n >> 1;
    }

    return set_bit_counter;
}

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

Solving Approach