17. Extract the Nibble from an 8-bit Register

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

unsigned char extractNibble(unsigned char reg, int pos) {
   if(pos==0)
   {
    reg = ((reg >> pos) & 0x0F);
   }
    else if(pos==1)
    {
    reg = ((reg >> 4) & 0x0F);
    }
    else
    {
    printf("incorrect position");
    }
      return reg;
}

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