Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>
#include <stdint.h>
unsigned char extractNibble(unsigned char reg, int pos) {
    // Write your code here
    if (pos==0){
        // extract lower nibble
        uint8_t nibble=(reg >> 0)&0x0F;
        return nibble;
    }
    else{
        uint8_t nibble=(reg >> 4)&0x0F;
        return nibble;
    }
}

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

Solving Approach