number of days in each month

[avi123]

Hello,

I was wondering if there is a function/class that returns the number of days in a month according to month & year

I mean, for example it should retrun for February 28/29 according to the year

Or should I write one of my own?

Thanks
Avi

[Kheun]

Here's one.

#include <time.h>

int getDaysOfMonthYear(int month, int year)
{
	tm currentMonth = {0, 0, 0, 1 /* first day of the month */, month-1 /* Zero-base */, year-1900 /* Time starts at 1900 */, 0, 0, 0};
	tm nextMonth = {0, 0, 0, 1, month, year-1900, 0, 0, 0};
	time_t diff = mktime(&nextMonth) - mktime(&currentMonth);

	return diff/(60*60*24);
}

[marten_range]

And another using boost:ate_time:

#include <cstddef>
#include <cstdlib>

#include "boost/date_time/gregorian/gregorian.hpp"
#include <iostream>

int main(int, char*)
{
    // Prints last day of feb 2004
    std::cout 
        << boost::gregorian::gregorian_calendar::end_of_month_day(2004, 2)
        << std::endl;

    return EXIT_SUCCESS;
}

See www.boost.org (seems like the site is down right now) for more information.


Hope this helps