Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    
    unsigned char result =0;

    if(pos == 0)
    {
     result = (reg & 0x0F);
    }
    else
    {
      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