17. Extract the Nibble from an 8-bit Register

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    // Write code here
    if (pos == 0){
        unsigned char lower = (reg >> 0) & 0x0F;   
        return lower;
    }
    else{
        unsigned char higher = (reg >> 4) & 0x0F;
        return higher;
    }

}

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

https://dev.to/hrishikesh_karande/14-extracting-a-nibble-from-an-8-bit-register-in-c-473m