34. Count Set Bits in an 8-bit Register

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

uint8_t count_set_bits(uint8_t reg) {
    // Your code here

    int count = 0;

    uint8_t val;

    uint8_t mask = 0X01;

    for(int i=0;i<8;i++){


        val = reg & mask;

        if((val & mask)==1){
            count ++;
        }
        reg = reg >> 1;
        
    }

    return count;
}

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