Serialized Data Buffer

Code

#include <stdio.h>
#include <stdint.h>
#define START 0xA5
#define END 0x5A
#define eight_bit (1<<8)-1

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]=START;
    buffer[1]=command;
    buffer[2]=value&eight_bit;
    buffer[3]=value>>8;
    buffer[4]=status;
    buffer[5]=checksum&eight_bit;
    buffer[6]=(checksum>>8)&eight_bit;
    buffer[7]=(checksum>>16)&eight_bit;
    buffer[8]=(checksum>>24)&eight_bit;
    buffer[9]=END;
    // 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