34. Count Set Bits in an 8-bit Register

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

uint8_t count_set_bits(uint8_t n) {
    int cnt = 0 ; 
   
    while(n) {
        int bit = n &1 ; 
         if(bit == 1 ) ++cnt ; 
         n>>=1 ; 
    }
    return cnt;
}

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