Count Set Bits in an 8-bit Register

Code

#include <stdio.h>
#include <stdint.h>

uint8_t count_set_bits(uint8_t reg) {
    int n = 0;
    for (int i=0; i<8; i++) {
        if (reg&1) {
            n++;
        }
        reg = (reg >> 1);
    }
    return n;
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    printf("%u", count_set_bits(reg));
    return 0;
}

Solving Approach