Extract the Nibble from an 8-bit Register

Solving Approach

How do you plan to solve it?

Code

#include <stdio.h>

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

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