Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    if(pos == 1)
    return (reg >> 4); //& 0x0F;
    else 
    return reg & 0x0F;
    

}

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

Solving Approach