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
    uint8_t Start = 0xA5;
    uint8_t End = 0x5A;

    *(buffer + 0) = Start;
    *(buffer + 1) = command;
    *(buffer + 2) = (value>>0)&0xFF;
    *(buffer + 3) = (value>>8)&0xFF;
    *(buffer + 4) = status;
    *(buffer + 5) = (checksum>>0)&0xFF;
    *(buffer + 6) = (checksum>>8)&0xFF;
    *(buffer + 7) = (checksum>>16)&0xFF;
    *(buffer + 8) = (checksum>>24)&0xFF;
    *(buffer + 9) = End;

    // Then print buffer
    for(int i = 0; i<10; 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;
}

Solving Approach