17. Extract the Nibble from an 8-bit Register

#include <stdio.h>


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

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