9b5d99078e
[SVN r43422]
78 lines
2.3 KiB
XML
78 lines
2.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
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"../../../tools/boostbook/dtd/boostbook.dtd">
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<!-- Copyright (c) 2001-2004 CrystalClear Software, Inc.
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Subject to the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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-->
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<section id="date_time.examples.dates_as_strings">
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<title>Dates as Strings</title>
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<para>
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Various parsing and output of strings.
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</para>
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<programlisting>
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<![CDATA[
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/* The following is a simple example that shows conversion of dates
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* to and from a std::string.
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*
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* Expected output:
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* 2001-Oct-09
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* 2001-10-09
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* Tuesday October 9, 2001
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* An expected exception is next:
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* Exception: Month number is out of range 1..12
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*/
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#include "boost/date_time/gregorian/gregorian.hpp"
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#include <iostream>
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#include <string>
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int
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main()
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{
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using namespace boost::gregorian;
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try {
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// The following date is in ISO 8601 extended format (CCYY-MM-DD)
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std::string s("2001-10-9"); //2001-October-09
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date d(from_simple_string(s));
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std::cout << to_simple_string(d) << std::endl;
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//Read ISO Standard(CCYYMMDD) and output ISO Extended
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std::string ud("20011009"); //2001-Oct-09
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date d1(from_undelimited_string(ud));
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std::cout << to_iso_extended_string(d1) << std::endl;
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//Output the parts of the date - Tuesday October 9, 2001
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date::ymd_type ymd = d1.year_month_day();
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greg_weekday wd = d1.day_of_week();
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std::cout << wd.as_long_string() << " "
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<< ymd.month.as_long_string() << " "
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<< ymd.day << ", " << ymd.year
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<< std::endl;
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//Let's send in month 25 by accident and create an exception
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std::string bad_date("20012509"); //2001-??-09
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std::cout << "An expected exception is next: " << std::endl;
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date wont_construct(from_undelimited_string(bad_date));
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//use wont_construct so compiler doesn't complain, but you wont get here!
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std::cout << "oh oh, you shouldn't reach this line: "
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<< to_iso_string(wont_construct) << std::endl;
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}
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catch(std::exception& e) {
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std::cout << " Exception: " << e.what() << std::endl;
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}
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return 0;
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}
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]]>
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</programlisting>
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</section>
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