17. Extract the Nibble from an 8-bit Register

#include <stdio.h>

unsigned char extractNibble(unsigned char reg, int pos) {
    if (pos == 1) {
        return (reg >> 4) & 0x0F;  // Extract high nibble
    } else if (pos == 0) {
        return reg & 0x0F;         // Extract low nibble
    } else {
        return 0; // Invalid position
    }
}


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