Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>

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

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

Solving Approach