Extract the Nibble from an 8-bit Register

Code

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    // Write your code here
    int result = 0;
    if(pos){
        for (int i = 4; i < 8; i++){
            if (reg & (1 << i)) result |= (1 << (i - 4));
        } 
    }else{
        for (int i = 0; i < 4; i++){
            if (reg & (1 << i)) result |= (1 << i);
        } 
    }
    return result;
}

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

Solving Approach