27. Extract Bit Field from 16-bit Register

#include <stdio.h>
#include <stdint.h>
#define POS 4
#define LEN 5
#define MASK ((1U<<LEN) -1)
uint8_t extract_field(uint16_t reg) {
    // Your logic here
    uint8_t output = 0;
    return output |= (reg>>POS)&MASK;

}

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