Pack Multiple Fields into a 16-bit Control Register

Code

#include <stdio.h>
#include <stdint.h>
#define mode_mask 0x07
#define speed_mask 0xF8
#define reserved_mask 0x0300
#define status_mask 0xfc00


uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here"
    uint16_t reg = (status<<10) | (speed<<3) | (mode);
    return reg;
    
}

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;
}

Solving Approach