Testing your Boost C++ libraries installation. Running the sample code that using the date_time Boost C++ library.

boostLibTest.cpp

// This source code written by Roland Ihasz 
#include <iostream>
#include "boost/date_time/gregorian/gregorian.hpp"

using namespace std;

int main()
{
   using namespace boost::gregorian;

   date today = day_clock::local_day();
   partial_date new_years_day(1,Jan);
   days days_since_year_start = today - new_years_day.get_date(today.year());
   cout << "Today's date: " << today << endl;
   cout << "Days since Jan 1 (" << today.year() << ") : "<< days_since_year_start.days() << endl;
   days days_until_year_start = new_years_day.get_date(today.year()+1) - today;
   cout << "Days until next Jan 1 (" << today.year()+1 << ") : " << days_until_year_start.days() << endl;

   return 0;
};