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 p;
    p.start=buffer[0];
    p.command=buffer[1];
    p.data|=buffer[3];
    p.data<<=8;
    p.data|=buffer[2];
    
    p.crc=buffer[4];
    p.end=buffer[5];

    printf("Start: %d\nCommand: %d\nData: %d\nCRC: %d\nEnd: %d\n",p.start,p.command,p.data,p.crc,p.end);
}

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