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]=(uint8_t)0xa5;
    buffer[1]=command;
    buffer[2]=(value&0xff);
    buffer[3]=(value>>8);
    buffer[4]=status;
    buffer[5]=(checksum)&((1<<8)-1);
    buffer[6]=(checksum>>8)&((1<<8)-1);
    buffer[7]=(checksum>>16)&((1<<8)-1);
    buffer[8]=checksum>>24;
    buffer[9]=(uint8_t)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