27. Extract Bit Field from 16-bit Register

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

uint8_t extract_field(uint16_t reg) {
    // Your logic here
    uint8_t ans = 0;
    for (int i=0; i<5; i++){
        int bit = (reg >> (4+i)) & 1;
        ans |= (bit << i);
    }
    return ans;
}

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