Serialized Data Buffer

#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];

    // Your logic to fill buffer
    buffer[0] = 0xA5;
    buffer[1] = command;
    *(uint16_t *)&buffer[2] = value;
    buffer[4] = status;
    *(uint32_t *)&buffer[5] = checksum;
    buffer[9] = 0x5A;

    for(int i =0; i < 10; i++)
    {
        printf("%d",buffer[i]);
        if(i != 9)
        {
            printf(" ");
        }
    }
    // 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;
}