Serialized Data Buffer

Code

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

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

    buffer[0] = 0x0A5; // start
    buffer[1] = command;
    *(uint16_t*)(buffer + 2) = value;
    buffer[4] = status;
    *(uint32_t*)(buffer + 5) = checksum;
    buffer[9] = 0x05A; // end
    for (int i = 0; i < 10; i++)
    {
        printf("%u ", buffer[i]);
    }
    // Then print buffer
}

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;
}

Solving Approach