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;
    *ptr++=0xA5;
    *ptr++=command;
    *(uint16_t *)ptr=value;
    ptr+= sizeof(uint16_t);
    *ptr++=status;
    *(uint32_t *)ptr=checksum;
    
    ptr+= sizeof(uint32_t);
    *ptr=0x5A;

    for(int i=0;i<10;i++){
        printf("%hhu ",buffer[i]);
    }
    // Then print buffer
}

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