(C++) GetToday

 

 

GetToday is a time code snippet to obtain today its date.

 

GetToday can depend on two different libraries:

• Boost.Date_Time
• STL

Technical facts

 

Operating system(s) or programming environment(s)

• Lubuntu 15.04 (vivid)

IDE(s):

• Qt Creator 3.1.1

Project type:

• Console application

C++ standard:

• C++98

Compiler(s):

• G++ 4.9.2

Libraries used:

• STL: GNU ISO C++ Library, version 4.9.2

 

 

 

 

 

Qt project file: ./CppGetToday/CppGetToday.pro

 

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include(../../ConsoleApplication.pri) include(../../Libraries/BoostAll.pri) SOURCES += main.cpp

 

 

 

 

 

./CppGetToday/main.cpp

 

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#include <iostream> #include <sstream> #include <boost/date_time/gregorian/gregorian.hpp> ///Get today its date //From http://www.richelbilderbeek.nl/CppGetToday.htm //Sat Jan 3 2015 std::string GetTodayBoost() noexcept {   const boost::gregorian::date today     = boost::gregorian::day_clock::local_day();   std::stringstream s;   s     << today.day_of_week() << " "     << today.month() << " "     << today.day() << " "     << today.year();   return s.str(); } ///Get today its date //From http://www.richelbilderbeek.nl/CppGetToday.htm //Sat Jan  3 13:48:05 2015 std::string GetTodayStl() noexcept {   std::time_t my_time;   std::time( &my_time );   const std::tm * const time_and_date = std::localtime(&my_time);   std::stringstream s;   s << std::asctime(time_and_date);   std::string str{s.str()};   assert(str.back() == '\n');   str.pop_back();   return str; } ///Get today its date //From http://www.richelbilderbeek.nl/CppGetToday.htm //2015-Jan-03 std::string GetTodayBoostSimpleString() noexcept {   const boost::gregorian::date today     = boost::gregorian::day_clock::local_day();   std::stringstream s;   s << boost::gregorian::to_simple_string(today);   return s.str(); } ///Get today its date //From http://www.richelbilderbeek.nl/CppGetToday.htm //2015-01-03 std::string GetTodayBoostIsoExtendedString() noexcept {   const boost::gregorian::date today     = boost::gregorian::day_clock::local_day();   std::stringstream s;   s << boost::gregorian::to_iso_extended_string(today);   return s.str(); } ///Get today its date //From http://www.richelbilderbeek.nl/CppGetToday.htm //20150103 std::string GetTodayBoostIsoString() noexcept {   const boost::gregorian::date today     = boost::gregorian::day_clock::local_day();   std::stringstream s;   s << boost::gregorian::to_iso_string(today);   return s.str(); } ///Get today its date //From http://www.richelbilderbeek.nl/CppGetToday.htm //2015-01-03 std::string GetTodayBoostSqlString() noexcept {   const boost::gregorian::date today     = boost::gregorian::day_clock::local_day();   std::stringstream s;   s << boost::gregorian::to_sql_string(today);   return s.str(); } int main() {   std::cout     << GetTodayStl() << '\n'     << GetTodayBoost() << '\n'     << GetTodayBoostIsoExtendedString() << '\n'     << GetTodayBoostIsoString() << '\n'     << GetTodayBoostSqlString() << '\n'   ; } /* Screen output: Sat Jan  3 13:48:43 2015 Sat Jan 3 2015 2015-01-03 20150103 2015-01-03 */