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
    buffer[0]=0xA5;
    buffer[9]=0x5A;
    buffer[1]=command;
    buffer[2]=(value);
    buffer[3]=(value>>8);
    buffer[4]=status;
    for(int i=3; i>=0; i--)
    {
        buffer[5+i]=(checksum>>i*8);
    }
    // Then print buffer
    for(int i=0; i<10; i++)
    {
        printf("%d", 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;
}

Solving Approach