45. Serialized Data Buffer

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

#pragma pack(1)
typedef struct packet {
    uint8_t start;
    uint8_t cmd;
    uint16_t value;
    uint8_t status;
    uint32_t checksum;
    uint8_t end;
} packet_t;
#pragma pack()

void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    uint8_t buffer[10];

   packet_t pkt;
    pkt.start = 0xA5;
    pkt.cmd = command;
    pkt.value = value;
    pkt.status = status;
    pkt.checksum = checksum;
    pkt.end = 0x5A;

    memcpy(buffer, &pkt, sizeof(packet_t));

    for (size_t i = 0; i < sizeof(packet_t); i++) {
        printf("%u ", buffer[i]);
    }
   
   
}

int main() {
    uint8_t cmd, status;
    uint16_t val;
    uint32_t crc;

    scanf("%hhu %hu %hhu %u", &cmd, &val, &status, &crc);
    build_packet(cmd, val, status, crc);
    return 0;
}