17. Extract the Nibble from an 8-bit Register

#include <stdio.h>
//#include <cstdint>


unsigned char extractNibble(unsigned char reg, int pos) {
    if(pos == 0){
        unsigned char low_nibble = reg & 0x0F;
        return low_nibble;
    }
    else{
        unsigned char high_nibble = (reg & 0xF0)>>4;
        return high_nibble;
    }
}

int main() {
    unsigned char reg;
    int pos;
    scanf("%hhu %d", &reg, &pos);
    printf("%d", extractNibble(reg, pos));
    return 0;
}