The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include <chrono>
#include <ctime>
#include <string>
#include <iostream>
std::string asString (const std::chrono::system_clock::time_point& tp)
{
// convert to system time:
std::time_t t = std::chrono::system_clock::to_time_t(tp);
std::string ts = std::ctime(&t); // convert to calendar time
ts.resize(ts.size()-1); // skip trailing newline
return ts;
}
int main()
{
// print the epoch of this system clock:
std::chrono::system_clock::time_point tp;
std::cout << "epoch: " << asString(tp) << std::endl;
// print current time:
tp = std::chrono::system_clock::now();
std::cout << "now: " << asString(tp) << std::endl;
// print minimum time of this system clock:
tp = std::chrono::system_clock::time_point::min();
std::cout << "min: " << asString(tp) << std::endl;
// print maximum time of this system clock:
tp = std::chrono::system_clock::time_point::max();
std::cout << "max: " << asString(tp) << std::endl;
}