27. Extract Bit Field from 16-bit Register

#include <stdio.h>
#include <stdint.h>

uint8_t extract_field(uint16_t reg) {
    // Your logic here
    uint16_t newReg;

    for (int i = 4; i <= 8; i++){
        if (reg & (1<<i)){
            newReg |= (1<<(i-4));
        }
    }
    return newReg;
}

int main() {
    uint16_t reg;
    scanf("%hx", &reg);
    printf("%u", extract_field(reg));
    return 0;
}