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) {
    // Overlay struct and print values
    Packet pkt;
        pkt.start = *(buffer);
        pkt.command = *(buffer + 1);
        pkt.data = *(buffer + 2) | ( *(buffer + 3) << 8);
        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;
}