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[0];
    // Your logic to fill buffer
    *ptr = 0xA5;
    *ptr++;
    *ptr = command;
    *ptr++;
    *ptr = value;
    *ptr++;
    *ptr = value >> 8;
    *ptr++;
    *ptr = status;
    *ptr++;
    *ptr=checksum;
    *ptr++;
    *ptr=checksum >> 8;
    *ptr++;
    *ptr=checksum >> 16;
    *ptr++;
    *ptr=checksum >> 24;
    *ptr++;
    *ptr = 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