34. Count Set Bits in an 8-bit Register

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

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

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