45. 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];
    *(buffer) = (0xA5);
    *(buffer + 1) = command;
    *(buffer + 2) = ((value & 0x00FF));
    *(buffer + 3) = ((value & 0xFF00) >> 8);
    *(buffer + 4) = status;
    *(buffer + 5) = (checksum & 0x000000FF);
    *(buffer + 6) = ((checksum & 0x0000FF00) >> 8);
    *(buffer + 7) = ((checksum & 0x00FF0000) >> 16);
    *(buffer + 8) = ((checksum & 0xFF000000) >> 24);
    *(buffer + 9) = (0x5A);

    for(int i = 0; i < 10; i++){
        printf("%u", *(buffer + i));
        if(i != 9) printf(" ");
    }
}

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;
}