25. Pack Multiple Fields into a 16-bit Control Register

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

#define Mode(x) (x&((1<<3)-1))<<0
#define Speed(x) (x&(1<<5)-1)<<3
#define Status(x) (x&(1<<6)-1)<<10

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t find = 0;
    find |= Mode(mode);
    find |= Speed(speed);
    find |= Status(status);
    return find;
}

int main() {
    uint8_t mode, speed, status;
    scanf("%hhu %hhu %hhu", &mode, &speed, &status);

    uint16_t reg = pack_register(mode, speed, status);
    printf("%u", reg);
    return 0;
}