79. Extract Packet Fields from Byte Stream

#include <stdio.h>
#include <stdint.h>

typedef struct {
    uint8_t start;
    uint8_t command;
    uint16_t data;
    uint8_t crc;
    uint8_t end;
} Packet;

void print_packet_fields(uint8_t *buffer) {
    Packet pkt;
    pkt.start = *buffer;
    pkt.command = *(buffer+1);
    pkt.data = *(buffer+3);
    pkt.data = (pkt.data << 8) | *(buffer+2);
    pkt.crc = *(buffer+4);
    pkt.end = *(buffer+5);
    printf("Start: %d\n",pkt.start);
    printf("Command: %d\n",pkt.command);
    printf("Data: %d\n",pkt.data);
    printf("CRC: %d\n",pkt.crc);
    printf("End: %d\n",pkt.end);
}

int main() {
    uint8_t buffer[6];
    for (int i = 0; i < 6; i++) {
        scanf("%hhu", &buffer[i]);
    }
    print_packet_fields(buffer);
    return 0;
}