70. Packet Layout Using Union with Struct

#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;

// 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
    Packet pac;
    pac.raw[0]=s;
    pac.raw[1]=c;
    pac.raw[2]=d&0xFF;
    pac.raw[3]=(d>>8)&0XFF;
    pac.raw[4]=crc;
    pac.raw[5]=e;
    printf("%u %u %u %u %u %u",pac.raw[0],pac.raw[1],pac.raw[2],pac.raw[3],pac.raw[4]
    ,pac.raw[5],pac.raw[6]);
}

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;
}