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* packet = (Packet* )buffer;
    // int size = sizeof(Packet);
    // int i = 0;
    
    // printf("Input: ");
    // for (i = 0; i < size; ++i)
    // {
    //    printf("%lu ", (unsigned int )buffer[i]);
    // }

    // printf("\nOutput:\n");

    printf("Start: %lu\n", (unsigned int)packet->start);
    printf("Command: %lu\n", (unsigned int)packet->command);
    printf("Data: %lu\n", (unsigned int)packet->data);
    printf("CRC: %lu\n", (unsigned int)packet->crc);
    printf("End: %lu\n", (unsigned int)packet->end);
}

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