27. Extract Bit Field from 16-bit Register

#include <stdio.h>
#include <stdint.h>
uint32_t mark;

uint8_t extract_field(uint16_t reg) {
    mark = ((reg >> 4) & ( 0x0000001f));

    
    

    return mark;
}

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