17. Extract the Nibble from an 8-bit Register

#include <stdio.h>
#include <stdint.h>
unsigned char extractNibble(unsigned char reg, int pos) {
    // Write your code here
   uint8_t x;
   if(pos==0){
    x=(reg >>0)&0x0F;
   }
   else{
    x=(reg >>4)&0x0F;
   }
   return x;
   }

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