27. Extract Bit Field from 16-bit Register

#include <stdio.h>
#include <stdint.h>
//0x100000
//0xfffff
uint8_t extract_field(uint16_t reg) {
    // Your logic here
    uint16_t mask = ((1<<5)-1)<<4;

    return (reg&mask)>>4;
}

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