cpp code for Protocol Buffers

add_person.cc

/**
    Copyright: (c) SAEKI Yoshiyasu
    License  : MIT-style license
               <http://www.opensource.org/licenses/mit-license.php>
    last updated: 2011/07/16
**/

#include <iostream>
#include <fstream>
#include <string>
#include "person.pb.h"
using namespace std;

int main(int argc, char* argv[]) {
    GOOGLE_PROTOBUF_VERIFY_VERSION;
    
    fstream input("PersonBook", ios::in | ios::binary);
    if (!input) {
        cout << argv[1] << ": File not found.  Creating a new file." << endl;
    }

    Person p1;
    p1.set_id(1);
    p1.set_name("saeki");
    p1.set_email("saeki@example.org");

    Person p2;
    p2.set_id(2);
    p2.set_name("furukawa");
    p2.set_email("furukawa@example.org");

    fstream output("PersonBook", ios::out | ios::trunc | ios::binary);
    if (!p1.SerializeToOstream(&output)
        || !p2.SerializeToOstream(&output)) {
        cerr << "Failed to write address book." << endl;
        return -1;
    }

    google::protobuf::ShutdownProtobufLibrary();
    return 0;
}