How to display the current time in c++

Several methods to display the current time in C: use time() to obtain the timestamp, use the std::chrono class to obtain the system time, use a third-party library (such as Boost.Date_Time)

How to display the current time in C

There are several ways to display the current time in C:

1. Use the standard library function time()

<code class="cpp">#include <iostream>
#include <ctime>

int main() {
  time_t now = time(0);
  std::cout << "Current time: " << ctime(&now);
  return 0;
}</code>

2. Use the class std::chrono

<code class="cpp">#include <iostream>
#include <chrono>

int main() {
  auto now = std::chrono::system_clock::now();
  auto time_t_now = std::chrono::system_clock::to_time_t(now);
  std::cout << "Current time: " << ctime(&time_t_now);
  return 0;
}</code>

3. Use third-party libraries

There are many third-party libraries that can help you display the current time, such as Boost.Date_Time:

<code class="cpp">#include <iostream>
#include <boost/date_time/posix_time/posix_time.hpp>

int main() {
  boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
  std::cout << "Current time: " << now;
  return 0;
}</code>

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