std::put_time

template< class CharT >
/*unspecified*/ put_time( const std::tm* tmb, const CharT* fmt );

When used in an expression out << put_time(tmb, fmt), converts the date and time information from a given calendar time tmb to a character string according to format string fmt, as if by calling std::strftime, std::wcsftime, or analog (depending on CharT), according to the std::time_put facet of the locale currently imbued in the output stream out.

Parameters

Return value

Returns an object of unspecified type such that if out is the name of an output stream of type std::basic_ostream<CharT, Traits>, then the expression out << put_time(tmb, fmt) behaves as if the following code was executed:

typedef std::ostreambuf_iterator<CharT, Traits> Iter;
typedef std::time_put<CharT, Iter> TimePut;
const TimePut& tp = std::use_facet<TimePut>(out.getloc());
const Iter end = tp.put(Iter(out.rdbuf()), out, out.fill(), tmb, fmt, fmt + Traits::length(fmt));
if (end.failed())
out.setstate(std::ios_base::badbit);

Example

#include <iostream>
#include <iomanip>
#include <ctime>
 
int main()
{
    std::time_t t = std::time(nullptr);
    std::tm tm = *std::localtime(&t);
    std::cout.imbue(std::locale("ru_RU.utf8"));
    std::cout << "ru_RU: " << std::put_time(&tm, "%c %Z") << '\n';
    std::cout.imbue(std::locale("ja_JP.utf8"));
    std::cout << "ja_JP: " << std::put_time(&tm, "%c %Z") << '\n';
}

ru_RU: Ср. 28 дек. 2011 10:21:16 EST
ja_JP: 2011年12月28日 10時21分16秒 EST

See also