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 *buf = buffer;
    *buf = 0xA5; //start
    buf++;
    *buf = command;
    buf++;
    *buf = value & 0xFF;
    buf++;
    *buf = (value >> 8) & 0xFF;
    buf++;
    *buf = status;
    //buffer++;
    for(int i = 0; i < 4; i++){
        buf++;
        *buf=(checksum >> (i*8)) & 0xFF;
    }
    buf++;
    *buf = 0x5A;
    
    // 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