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

#include <stdio.h>
#include <stdint.h>
#define Mode(reg,a) (a | reg)
#define Speed(reg,a) ((a | reg)<<3)
#define Status(reg,a) ((a | reg)<<10)

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

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;
}