Packet Layout Using Union with Struct

Code

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

typedef union {
    struct {
        uint8_t start;
        uint8_t command;
        uint16_t data;
        uint8_t crc;
        uint8_t end;
    } fields;
    uint8_t raw[6];
} Packet;

Packet commnPkt;

// Fill struct fields and print raw bytes
void build_and_print_packet(uint8_t s, uint8_t c, uint16_t d, uint8_t crc, uint8_t e) {
    // Your logic here

    commnPkt.raw[0] = s;
    commnPkt.raw[1] = c;

    commnPkt.raw[2] = (d >> 0) & 0XFF;
    commnPkt.raw[3] = (d >> 8) & 0XFF;

    commnPkt.raw[4] = crc;

    commnPkt.raw[5] = e;

    printf("%u ",commnPkt.raw[0]);
    printf("%u ",commnPkt.raw[1]);
    printf("%u ",commnPkt.raw[2]);
    printf("%u ",commnPkt.raw[3]);
    printf("%u ",commnPkt.raw[4]);
    printf("%u ",commnPkt.raw[5]);







    // for ( int i = 0;i < sizeof(commnPkt.raw); i++)
    // {   
    //     if(i == 2 || i == 3)
    //         printf("%d",commnPkt.raw[i]);
    //     else
    //         printf("%d\t",commnPkt.raw[i]);

    // }




}

int main() {
    uint8_t s, c, crc, e;
    uint16_t d;
    scanf("%hhu %hhu %hu %hhu %hhu", &s, &c, &d, &crc, &e);
    build_and_print_packet(s, c, d, crc, e);
    return 0;
}

Solving Approach