std::asctime
| Defined in header <ctime>
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| char* asctime( const std::tm* time_ptr ); |
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Converts given calendar time std::tm to a textual representation. The resulting string has the following format:
Www Mmm dd hh:mm:ss yyyy
- Www - the day of the week (one of Mon, Tue, Wed, Thu, Fri, Sat, Sun).
- Mmm - the month (one of Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec).
- dd - the day of the month
- hh - hours
- mm - minutes
- ss - seconds
- yyyy - years
The function does not support localization.
Contents |
[edit] Parameters
| time_ptr | - | pointer to a std::tm object specifying the time to print |
[edit] Return value
Pointer to a static null-terminated character string holding the textual representation of date and time. The string may be shared between std::asctime and std::ctime, and may be overwritten on each invocation of any of those functions.
[edit] Notes
This function returns a pointer to static data and is not thread-safe. POSIX marks this function obsolete and recommends std::strftime instead.
The behavior is undefined if the output string would be longer than 25 characters, if timeptr->tm_wday or timeptr->tm_mon are not within the expected ranges, or if timeptr->tm_year exceeds INT_MAX-1990.
Some implementations handle timeptr->tm_mday==0 as meaning the last day of the preceding month.
[edit] Example
#include <ctime> #include <iostream> int main() { std::time_t result = std::time(NULL); std::cout << std::asctime(std::localtime(&result)); }
Output:
Tue Dec 27 16:45:52 2011
[edit] See also
| converts a time_t object to a textual representation (function) | |
| converts a tm object to custom textual representation (function) | |
| (C++11) |
formats and outputs a date/time value according to the specified format (function template) |
| C documentation for asctime
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