Serialized Data Buffer

Code

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

#define START_BYTE  0xA5
#define END_BYTE    0x5A;

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] = START_BYTE;
    buffer[1] = command;
    memcpy(&buffer[2], (uint8_t*)&value, sizeof(uint16_t));
    buffer[4] = status;
    memcpy(&buffer[5], (uint8_t*)&checksum, sizeof(uint32_t));
    buffer[9] = END_BYTE;
    // Then print buffer
    for (int i = 0; i < 10; i++) {
        printf("%d ", 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;
}

Solving Approach