read.cc

#include <iostream>
#include <fstream>
#include <string>
#include "addressbook.pb.h"

using namespace std;


void ListPeople( const protobuf_example::AddressBook& _address_book)
{
    for (int i =0; i < _address_book.person_size(); i++)
    {
        const protobuf_example::Person& person = _address_book.person(i);

        cout << "Person ID" << person.id() << endl;
        cout << "Name     " << person.name() << endl;
        cout << " E-mail address: " << person.email() << endl;

        for (int j = 0; j < person.phone_size(); j++)
        {
            const protobuf_example::Person::PhoneNumber& phone = person.phone(j);

            switch(phone.type())
            {
                case protobuf_example::Person::MOBILE: 
                    cout << "   Mobile phone #: "; break;
                case protobuf_example::Person::HOME:
                    cout << "   Home phone #: "; break;
                case protobuf_example::Person::WORK:
                    cout << "   Work phone #: "; break;
            }
            cout << phone.number() << endl;
        }
    }
}


int main(int argc, char *argv[])
{
    GOOGLE_PROTOBUF_VERIFY_VERSION;

    if (argc != 2)
    {
        cerr << "Usage: " << argv[0] << " ADDRESS_BOOK_FILE" << endl;
        return -1;
    }

    protobuf_example::AddressBook address_book;

    {
        fstream input(argv[1], ios::in | ios::binary);
        if (!address_book.ParseFromIstream(&input))
        {
            cerr << "Failed to parse address book. " << endl;
            return -1;
        }
    }

    ListPeople(address_book);

    google::protobuf::ShutdownProtobufLibrary();

    return 0;
}