61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
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#include "boost/date_time/local_time/local_time.hpp"
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#include <iostream>
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/* This example shows a program that calculates the arrival time of a plane
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* that flys from Phoenix to New York. During the flight New York shifts
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* into daylight savings time (Phoenix doesn't because Arizona doesn't use
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* DST).
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*
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*
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*/
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int main()
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{
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using namespace boost::gregorian;
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using namespace boost::local_time;
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using namespace boost::posix_time;
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//setup some timezones for creating and adjusting local times
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//This user editable file can be found in libs/date_time/data.
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tz_database tz_db;
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try {
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tz_db.load_from_file("../../data/date_time_zonespec.csv");
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}catch(data_not_accessible dna) {
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std::cerr << "Error with time zone data file: " << dna.what() << std::endl;
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exit(EXIT_FAILURE);
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}catch(bad_field_count bfc) {
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std::cerr << "Error with time zone data file: " << bfc.what() << std::endl;
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exit(EXIT_FAILURE);
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}
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time_zone_ptr nyc_tz = tz_db.time_zone_from_region("America/New_York");
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//Use a newly created time zone rule
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time_zone_ptr phx_tz(new posix_time_zone("MST-07:00:00"));
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//local departure time in Phoenix is 11 pm on March 13 2010
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// (NY changes to DST on March 14 at 2 am)
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local_date_time phx_departure(date(2010, Mar, 13), hours(23),
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phx_tz,
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local_date_time::NOT_DATE_TIME_ON_ERROR);
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local_date_time nyc_departure = phx_departure.local_time_in(nyc_tz);
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time_duration flight_length = hours(4) + minutes(30);
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local_date_time phx_arrival = phx_departure + flight_length;
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local_date_time nyc_arrival = phx_arrival.local_time_in(nyc_tz);
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std::cout << "departure PHX time: " << phx_departure << std::endl;
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std::cout << "departure NYC time: " << nyc_departure << std::endl;
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std::cout << "arrival PHX time: " << phx_arrival << std::endl;
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std::cout << "arrival NYC time: " << nyc_arrival << std::endl;
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}
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/* Copyright 2005: CrystalClear Software, Inc
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* http://www.crystalclearsoftware.com
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*
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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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