public override bool check()
{
licenseEndDate = installDate;
licenseEndDate.plusDay(dayOffFree);
DataTime_My localDate = new DataTime_My().localDateTime();
return(new DataTime_My().compareDates(licenseEndDate, localDate) >= 0);
}
// return and SET date of the next day
public DataTime_My Nextday(DataTime_My ob)
{
day = ob.day;
month = ob.month;
year = ob.year;
day++;
if (((month <= 7) && (month % 2 == 1)) || ((month >= 8) && (month % 2 == 0)))
{
if (day > 31)
{
day = 1; month++;
}
}
else
{
if ((month == 4) || (month == 6) || (month == 9) || (month == 11))
{
if (day > 30)
{
day = 1; month++;
}
}
else
{
if (((year % 4 == 0) && (year % 100 != 0)) ||
((year % 4 == 0) && (year % 100 != 0) && (year % 400 == 0)))
{
if (day > 29)
{
day = 1; month++;
}
}
else
{
if (day > 28)
{
day = 1; month++;
}
}
}
}
if (month > 12)
{
month = 1; year++;
}
return(new DataTime_My(day, month, year));
}
// return and SET date of the previous day
public DataTime_My Previousday(DataTime_My ob)
{
day = ob.day;
month = ob.month;
year = ob.year;
day--;
if (((month <= 7) && (month % 2 == 1)) || ((month >= 8) && (month % 2 == 0)))
{
if (day < 1)
{
if (month == 1 || month == 8)
{
day = 31; month--;
}
else
{
day = 30; month--;
if (month == 2)
{
if (((year % 4 == 0) && (year % 100 != 0)) ||
((year % 4 == 0) && (year % 100 != 0) && (year % 400 == 0)))
{
day = 29;
}
else
{
day = 28;
}
}
}
}
}
else if ((month == 2) || (month == 4) || (month == 6) || (month == 9) || (month == 11))
{
if (day < 1)
{
day = 31; month--;
}
}
if (month == 0)
{
day = 31;
month = 12;
year--;
}
return(new DataTime_My(day, month, year));
}
// Compare two dates
// if the first is later (larger) and the second is earlier (less) then it return 1
// if they are equal, it return 0
// if the first date is earlier (less) and the second later (greater) it return -1
public int compareDates(DataTime_My firstDate, DataTime_My secondDate)
{
if (firstDate.year > secondDate.year)
{
return(1);
}
else if (firstDate.year < secondDate.year)
{
return(-1);
}
else
{ // years are equals
if (firstDate.month > secondDate.month)
{
return(1);
}
else if (firstDate.month < secondDate.month)
{
return(-1);
}
else
{ // month are equals
if (firstDate.day > secondDate.day)
{
return(1);
}
else if (firstDate.day < secondDate.day)
{
return(-1);
}
else
{
return(0);
}
}
}
return(-1);
}
public Shareware(string name, string dev, DataTime_My date, int days) : base(name, dev)
{
this.installDate = date;
this.dayOffFree = days;
}
public ComercialSoftware(string name, string dev, DataTime_My install, int freeDays) : base(name, dev)
{
this.installDate = install;
this.dayOffFree = freeDays;
}