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

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