std::put_time

Defined in header <iomanip>
template< class charT > /*unspecified*/ put_time( const std::tm* tmb, const charT* fmt);		(since C++11)

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.

This function behaves as a formatted output function.

Parameters

tmb	-	pointer to the calendar time structure as obtained from localtime() or gmtime()
fmt	-	pointer to a null-terminated CharT string specifying the format of conversion. The format string consists of zero or more conversion specifiers and ordinary characters (except %). All ordinary characters, including the terminating null character, are copied to the output string without modification. Each conversion specification begins with % character, optionally followed by E or O modifier (ignored if unsupported by the locale), followed by the character that determines the behavior of the specifier. The following format specifiers are available: Conversion specifier Explanation Used fields % writes literal %. The full conversion specification must be %%. n (C++11) writes newline character t (C++11) writes horizontal tab character Year Y writes year as a decimal number, e.g. 2017 tm_year EY (C++11) writes year in the alternative representation, e.g.平成23年 (year Heisei 23) instead of 2011年 (year 2011) in ja_JP locale tm_year y writes last 2 digits of year as a decimal number (range [00,99]) tm_year Oy (C++11) writes last 2 digits of year using the alternative numeric system, e.g. 十一 instead of 11 in ja_JP locale tm_year Ey (C++11) writes year as offset from locale's alternative calendar period %EC (locale-dependent) tm_year C (C++11) writes first 2 digits of year as a decimal number (range [00,99]) tm_year EC (C++11) writes name of the base year (period) in the locale's alternative representation, e.g. 平成 (Heisei era) in ja_JP tm_year G (C++11) writes ISO 8601 week-based year, i.e. the year that contains the specified week. In ISO 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements: Includes January 4 Includes first Thursday of the year tm_year, tm_wday, tm_yday g (C++11) writes last 2 digits of ISO 8601 week-based year, i.e. the year that contains the specified week (range [00,99]). In ISO 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements: Includes January 4 Includes first Thursday of the year tm_year, tm_wday, tm_yday Month b writes abbreviated month name, e.g. Oct (locale dependent) tm_mon h (C++11) synonym of b tm_mon B writes full month name, e.g. October (locale dependent) tm_mon m writes month as a decimal number (range [01,12]) tm_mon Om (C++11) writes month using the alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale tm_mon Week U writes week of the year as a decimal number (Sunday is the first day of the week) (range [00,53]) tm_year, tm_wday, tm_yday OU (C++11) writes week of the year, as by %U, using the alternative numeric system, e.g. 五十二 instead of 52 in ja_JP locale tm_year, tm_wday, tm_yday W writes week of the year as a decimal number (Monday is the first day of the week) (range [00,53]) tm_year, tm_wday, tm_yday OW (C++11) writes week of the year, as by %W, using the alternative numeric system, e.g. 五十二 instead of 52 in ja_JP locale tm_year, tm_wday, tm_yday V (C++11) writes ISO 8601 week of the year (range [01,53]). In ISO 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements: Includes January 4 Includes first Thursday of the year tm_year, tm_wday, tm_yday OV (C++11) writes week of the year, as by %V, using the alternative numeric system, e.g. 五十二 instead of 52 in ja_JP locale tm_year, tm_wday, tm_yday Day of the year/month j writes day of the year as a decimal number (range [001,366]) tm_yday d writes day of the month as a decimal number (range [01,31]) tm_mday Od (C++11) writes zero-based day of the month using the alternative numeric system, e.g. 二十七 instead of 27 in ja_JP locale Single character is preceded by a space. tm_mday e (C++11) writes day of the month as a decimal number (range [1,31]). Single digit is preceded by a space. tm_mday Oe (C++11) writes one-based day of the month using the alternative numeric system, e.g. 二十七 instead of 27 in ja_JP locale Single character is preceded by a space. tm_mday Day of the week a writes abbreviated weekday name, e.g. Fri (locale dependent) tm_wday A writes full weekday name, e.g. Friday (locale dependent) tm_wday w writes weekday as a decimal number, where Sunday is 0 (range [0-6]) tm_wday Ow (C++11) writes weekday, where Sunday is 0, using the alternative numeric system, e.g. 二 instead of 2 in ja_JP locale tm_wday u (C++11) writes weekday as a decimal number, where Monday is 1 (ISO 8601 format) (range [1-7]) tm_wday Ou (C++11) writes weekday, where Monday is 1, using the alternative numeric system, e.g. 二 instead of 2 in ja_JP locale tm_wday Hour, minute, second H writes hour as a decimal number, 24 hour clock (range [00-23]) tm_hour OH (C++11) writes hour from 24-hour clock using the alternative numeric system, e.g. 十八 instead of 18 in ja_JP locale tm_hour I writes hour as a decimal number, 12 hour clock (range [01,12]) tm_hour OI (C++11) writes hour from 12-hour clock using the alternative numeric system, e.g. 六 instead of 06 in ja_JP locale tm_hour M writes minute as a decimal number (range [00,59]) tm_min OM (C++11) writes minute using the alternative numeric system, e.g. 二十五 instead of 25 in ja_JP locale tm_min S writes second as a decimal number (range [00,60]) tm_sec OS (C++11) writes second using the alternative numeric system, e.g. 二十四 instead of 24 in ja_JP locale tm_sec Other c writes standard date and time string, e.g. Sun Oct 17 04:41:13 2010 (locale dependent) all Ec (C++11) writes alternative date and time string, e.g. using 平成23年 (year Heisei 23) instead of 2011年 (year 2011) in ja_JP locale all x writes localized date representation (locale dependent) all Ex (C++11) writes alternative date representation, e.g. using 平成23年 (year Heisei 23) instead of 2011年 (year 2011) in ja_JP locale all X writes localized time representation, e.g. 18:40:20 or 6:40:20 PM (locale dependent) all EX (C++11) writes alternative time representation (locale dependent) all D (C++11) equivalent to "%m/%d/%y" tm_mon, tm_mday, tm_year F (C++11) equivalent to "%Y-%m-%d" (the ISO 8601 date format) tm_mon, tm_mday, tm_year r (C++11) writes localized 12-hour clock time (locale dependent) tm_hour, tm_min, tm_sec R (C++11) equivalent to "%H:%M" tm_hour, tm_min T (C++11) equivalent to "%H:%M:%S" (the ISO 8601 time format) tm_hour, tm_min, tm_sec p writes localized a.m. or p.m. (locale dependent) tm_hour z (C++11) writes offset from UTC in the ISO 8601 format (e.g. -0430), or no characters if the time zone information is not available tm_isdst Z writes locale-dependent time zone name or abbreviation, or no characters if the time zone information is not available tm_isdst

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

Run this code

#include <iostream>
#include <iomanip>
#include <ctime>
int main()
{
    std::time_t t = std::time(NULL);
    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';
}

Output:

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

Template:cpp/locale/dcl list time putTemplate:cpp/chrono/c/dcl list strftimeTemplate:cpp/chrono/c/dcl list wcsftime