27. Extract Bit Field from 16-bit Register

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

uint8_t extract_field(uint16_t reg) {
    uint16_t field=0;
    ///field=( (reg & (0x1f<<4))>>4);
    /// sau 
    field= (reg>>4) &0x1f;

    return field;
}

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