17. Extract the Nibble from an 8-bit Register

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    // Write your code here
    //reg = reg >> 4;

    if(pos == 0){
        reg = reg << 4;
        reg = reg >> 4;
    }
    else if(pos == 1){
        reg = reg >> 4;
    }

    return reg;
}

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