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 buff[10];
    for (int i=0;i<10;i++){
        switch(i){
            case 0:
                buff[i]=0xA5;
                break;
            case 1:
                buff[i]=command;
                break;
            case 2:
                buff[i]=value & (0xff);
                break;
            case 3:
                buff[i]=value>>8;
                break;
            case 4:
                buff[i]=status;
                break;
            case 5:
                buff[i]=checksum & (0xff);
                break;
            case 6:
                buff[i]=(checksum>>8) & (0xff);
                break;
            case 7:
                buff[i]=(checksum>>16) & (0xff);
                break;
            case 8:
                buff[i]=(checksum>>24) & (0xff);
                break;
            case 9:
                buff[i]=0x5A;
                break;
        }
    }

    for (int i=0;i<10;i++)
        printf("%d ",buff[i]);
    // Your logic to fill buffer
    // 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