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];
    uint8_t* ptr = buffer;
    *(uint8_t*)ptr = 0xA5;
    ptr++;
    *(uint8_t*)ptr = command;
    ptr++;
    *(uint8_t*)ptr = value&0xFF;
    ptr++;
     *(uint8_t*)ptr = (value&0xFF00)>>8;
    ptr++;
    *(uint8_t*)ptr = status;
    ptr++;
    *(uint8_t*)ptr = checksum&0xFF;
    ptr++;
    *(uint8_t*)ptr = (checksum >> 8) &0xFF;
    ptr++;
    *(uint8_t*)ptr = (checksum>>16) & 0xFF;
    ptr++;
    *(uint8_t*)ptr = (checksum >> 24) & 0xFF;
    ptr++;
    *(uint8_t*)ptr = 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