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];

    // Your logic to fill buffer
    // Then print buffer
    *(buffer) = 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]);
    }
}

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