Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) 
{
    if(pos)
        return ((reg>>4)&0x0F); //if we need to extract higher nibble, we need to right by 4 times and then perform AND operation with 0x0F.

    return (reg&0x0F); //if we need to extract lower nibble, directly perform AND opeartion with 0x0F
}

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

Solving Approach