Extract the Nibble from an 8-bit Register

Solving Approach

How do you plan to solve it?

If we want to get upper nibble, i think shift bit is faster.
With lower nibble, we get 4 bit by AND with 0x0F

Code

#include <stdio.h>

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

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