ceph/src/boost/libs/date_time/xmldoc/ex_find_last_day_of_months.xml

   1 <?xml version="1.0" encoding="utf-8"?>
   2 <!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
   3 "../../../tools/boostbook/dtd/boostbook.dtd">
   4
   5 <!-- Copyright (c) 2001-2005 CrystalClear Software, Inc.
   6      Subject to the Boost Software License, Version 1.0.
   7      (See accompanying file LICENSE_1_0.txt or  http://www.boost.org/LICENSE_1_0.txt)
   8 -->
   9
  10 <section id="date_time.examples.end_of_month_day">
  11   <title>Last Day of the Months</title>
  12
  13   <para>
  14     Example that gets a month and a year from the user and finds the last day of each remaining month of that year.
  15   </para>
  16   <programlisting>
  17     <![CDATA[
  18   /* Simple program that finds the last day of the given month,
  19    * then displays the last day of every month left in the given year.
  20    */
  21
  22   #include "boost/date_time/gregorian/gregorian.hpp"
  23   #include <iostream>
  24
  25   int
  26   main()
  27   {
  28     using namespace boost::gregorian;
  29
  30     greg_year year(1400);
  31     greg_month month(1);
  32
  33     // get a month and a year from the user
  34     try {
  35       int y, m;
  36       std::cout << "   Enter Year(ex: 2002): ";
  37       std::cin >> y;
  38       year = greg_year(y);
  39       std::cout << "   Enter Month(1..12): ";
  40       std::cin >> m;
  41       month = greg_month(m);
  42     }
  43     catch(bad_year by) {
  44       std::cout << "Invalid Year Entered: " << by.what() << '\n'
  45         << "Using minimum values for month and year." << std::endl;
  46     }
  47     catch(bad_month bm) {
  48       std::cout << "Invalid Month Entered" << bm.what() << '\n'
  49         << "Using minimum value for month. " << std::endl;
  50     }
  51
  52     date start_of_next_year(year+1, Jan, 1);
  53     date d(year, month, 1);
  54
  55     // add another month to d until we enter the next year.
  56     while (d < start_of_next_year){
  57       std::cout << to_simple_string(d.end_of_month()) << std::endl;
  58       d += months(1);
  59     }
  60
  61     return 0;
  62   }
  63
  64     ]]>
  65   </programlisting>
  66 </section>