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];
    *buffer = 0xA5;
    *(buffer+1) = command;
    *(buffer+2) = value & 0xFF;
    *(buffer+3) = (value >> 8) & 0xFF;
    *(buffer+4) = status;
    *(buffer+5) = checksum & 0xFF;
    *(buffer+6) = (checksum >> 8)& 0xFF;
    *(buffer+7) = (checksum >> 16) &0xFF;
    *(buffer+8) = (checksum >> 24) & 0xFF;
    

    *(buffer+9) = 0x5A;
    
    // Your logic to fill buffer
    // 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