C++ chrono system time in milliseconds, time operations

Question

I\'ve got a small problem caused by insufficient documentation of C++11.

I\'d like to obtain a time since epoch in milliseconds, or nanoseconds or seconds and then I

Answer 1

You can do now.time_since_epoch() to get a duration representing the time since the epoch, with the clock's resolution. To convert to milliseconds use duration_cast:

auto duration = now.time_since_epoch();
auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();