days_till_new_year.cpp

boost库提供标准的C++ API 配合dev c++使用,功能更加强大

// This example displays the amount of time until new year's in days

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

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

  date::ymd_type today = day_clock::local_day_ymd();
  date new_years_day(today.year + 1,1,1);
  date_duration dd = new_years_day - date(today);
  
  std::cout << "Days till new year: " << dd.days() << std::endl;
  return 0;
};