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 res;
    res.start = *(buffer );
    printf("Start: %d" ,res.start );

    res.command = *(buffer +1 );
    printf("\nCommand: %d" ,res.command );

   
    res.data =  (*(buffer + 3) << 8 ) | *(buffer + 2);
    printf("\nData: %d" ,res.data );

    res.crc = *(buffer  + 4);
    printf("\nCRC: %d" ,res.crc );

    res.end = *(buffer +5 );
    printf("\nEnd: %d" ,res.end );

}

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