string DateTime::getFuture(unsigned int N)
{
    string future;
    int days = date.tm_mday + N;
    int mon = date.tm_mon;
    int year = date.tm_year;
    while (days > daysInMonth[mon])
    {
        days -= daysInMonth[mon];
        mon++;
        if (mon == 11)
        {
            mon = 0;
            year++;
        }
    }
    time_t seconds = time(NULL);
    tm newdate = *localtime(&seconds);
    newdate.tm_mday = days;
    newdate.tm_mon = mon;
    newdate.tm_year = year;
    mktime(&newdate);
    if (days < 10)
    {
        future = "0";
    }
    future += to_string(newdate.tm_mday) + " "
        + months[newdate.tm_mon] + " "
        + to_string(newdate.tm_year + 1900) + ", "
        + week[newdate.tm_wday];
    return future;
}