17. Extract the Nibble from an 8-bit Register

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    // Write your code here
    unsigned char restult = 0  ;
    if(pos==0)
    {
        restult = reg&0x0F;
    }
    else if (pos==1)
    {
        restult = (reg&0xF0)>>4;
    }
    return restult ; 
}

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