Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>
#include <cstdint>

unsigned char extractNibble(unsigned char reg, int pos) {
    if(pos==0){                  // Write your code here
      uint8_t result=(reg & 0x0F);
      return result;
    }
    else{
      uint8_t result=(reg >> 4) & 0x0F;
      return result; 
    }
}


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

Solving Approach