[C++] Przeszukiwanie pliku tekstowego

#include <iostream>
#include <string>
#include <fstream>
#include <vector>
#include <cstdlib>

using namespace std;

typedef vector < string > QuestionsDB;

string getQuestion( QuestionsDB & db, const size_t which )
{
    if( which > db.size() )
         return string( "Nie znaleziono pytania o takim indeksie!" );
   
    return db[ which - 1 ];
}

QuestionsDB loadQuestionsFromFile( string fname )
{
    ifstream file( fname.c_str() );
    if( !file.good() )
    {
        cout << "Nie udalo sie otworzyc bazy pytan! Stop.";
        exit( EXIT_FAILURE );
    }
   
    QuestionsDB db;
    string buffer;
    while( getline( file, buffer ) )
         db.push_back( buffer );
   
    return db;
}

int main()
{
    QuestionsDB db = loadQuestionsFromFile( "questions.txt" );
   
    unsigned int which = 0;
    cout << "Podaj nr pytania: ";
    cin >> which;
    cout << getQuestion( db, which );
   
    return 0;
}