How print current time in C++11?
c++, c++-chrono, c++11, locale
Solution
You can use `put_time` with a format string like `"%c"`. `%c` is the format specifier for the standard date and time string for the locale. The result looks like "Tue Jul 23 19:32:18 CEST 2013" on my machine (POSIX en_US locale, in a German timezone).
auto now = std::chrono::system_clock::now();
auto now_c = std::chrono::system_clock::to_time_t(now);
std::cout << std::put_time(std::localtime(&now_c), "%c") << '\n';
Problem
Is there an easy way in C++11 to print the current wall time using the appropriate formatting rules of the locale associated with the ostream being used? What I really want to do is something like this: ``` myStream << std::chrono::system_clock::now(); ``` and have the date and time printed in accord with whatever locale is associated with `myStream`. C++11 offers `put_time`, but it takes a formatting string, and I want the format to be determined by the locale associate with the stream. There's also `time_put` and `time_put_byname`, but based on the examples at cppreference.com, these functions are used in conjunction with `put_time`. Is there no simple way to print a timepoint value without manually formatting it?