How to calculate the number of weeks in a month

Question

Hi,

I want to calculate the total no of weeks in current month. Starting from Sunday or Monday. Is it possible to do in Qt

Answer 1

floor(Number of Days / 7)

Answer 2

I would say this problem is not specific to Qt, but Qt can help you with the QDate class. With this class you can get the current month :

QDate CurrentDate = QDate::currentDate();

The number of days of a given month :

CurrentDate.daysInMonth();

For the number of week calculation, it depends if you only want the number of full weeks in a month, or the number of weeks, taking partial weeks into account.

For the latter, here is how I would do it (considering the week starts on monday) :

const DAYS_IN_WEEK = 7;
QDate CurrentDate = QDate::currentDate();
int DaysInMonth = CurrentDate.daysInMonth();
QDate FirstDayOfMonth = CurrentDate;
FirstDayOfMonth.setDate(CurrentDate.year(), CurrentDate.month(), 1);

int WeekCount = DaysInMonth / DAYS_IN_WEEK;
int DaysLeft = DaysInMonth % DAYS_IN_WEEK;
if (DaysLeft > 0) {
   WeekCount++;
   // Check if the remaining days are split on two weeks
   if (FirstDayOfMonth.dayOfWeek() + DaysLeft - 1 > DAYS_IN_WEEK)
      WeekCount++;
}

This code has not been fully tested and is not garanteed to work !