In this articlew we will discuss how to get Current Date & Time in C++ using Boost Date Time Library.
Boost Date Time Library provides a type,
boost::posix_time::ptime
to specify a particular time point. It includes a date and timestamp representing a specific time point.
For example,
boost::posix_time::ptime timeObj = boost::posix_time::time_from_string("2016/2/19 9:01:33.10");Here timeObj represents a time point “2016/2/19 9:01:33.10”
It basically included a date and a time i.e.
// Get Date object from ptime object boost::gregorian::date dateObj = timeLocal.date(); std::cout<<"Date Object = "<<dateObj<<std::endl; // Get Time object from ptime object boost::posix_time::time_duration durObj = timeLocal.time_of_day(); std::cout<<"Time Object = "<<durObj<<std::endl;
Getting Current Time
// Get current system time boost::posix_time::ptime timeLocal = boost::posix_time::second_clock::local_time();
We can also get the date, month, year, hours, minute & Seconds from the ptime object using its member functions i.e.
// Get year Field from time object timeLocal.date().year(); // Get Month Field from time Object timeLocal.date().month(); // Get Day Field from time Object timeLocal.date().day(); // Get Hours Field from time Object timeLocal.time_of_day().hours(); // Get Minutes Field from time Object timeLocal.time_of_day().minutes(); // Get Seconds Field from time Object timeLocal.time_of_day().seconds();
Getting the Current Time in UTC Timezone
boost::posix_time::ptime timeUTC = boost::posix_time::second_clock::universal_time();
Complete example is as follows,
#include <boost/date_time.hpp>
#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
int main() {
// Get current system time
boost::posix_time::ptime timeLocal =
boost::posix_time::second_clock::local_time();
std::cout << "Current System Time = " << timeLocal << std::endl;
// Get Date object from ptime object
boost::gregorian::date dateObj = timeLocal.date();
std::cout << "Date Object = " << dateObj << std::endl;
// Get Time object from ptime object
boost::posix_time::time_duration durObj = timeLocal.time_of_day();
std::cout << "Time Object = " << durObj << std::endl;
std::cout << "Year = " << timeLocal.date().year() << std::endl;
std::cout << "Month = " << timeLocal.date().month() << std::endl;
std::cout << "Day of Month = " << timeLocal.date().day() << std::endl;
std::cout << "Hour of the Day = " << timeLocal.time_of_day().hours()<< std::endl;
std::cout << "Minute : = " << timeLocal.time_of_day().minutes() << std::endl;
std::cout << "Seconds : = " << timeLocal.time_of_day().seconds() << std::endl;
// Get the current time in UTC Timezone
boost::posix_time::ptime timeUTC =
boost::posix_time::second_clock::universal_time();
std::cout << "Current Time in UTC Timezone : " << timeUTC << std::endl;
}
Output:
Current System Time = 2016-Nov-14 22:58:03 Date Object = 2016-Nov-14 Time Object = 22:58:03 Year = 2016 Month = Nov Day of Month = 14 Hour of the Day = 22 Minute : = 58 Seconds : = 3 Current Time in UTC Timezone : 2016-Nov-14 17:28:03
To Compile the above code, use following command in linux,
g++ –std=c++11 example.cpp -lboost_date_time