std::ctime
| Defined in header <ctime>
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| char* ctime( const std::time_t* time ); |
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Converts given time since epoch to a calendar local time and then to a textual representation, as if by calling std::asctime(std::localtime(time)). 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 | - | pointer to a std::time_t 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. In addition, it modifies the static std::tm object which may be shared with std::gmtime and std::localtime. POSIX marks this function obsolete and recommends std::strftime instead.
The behavior may be undefined for the values of time_t that result in the string longer than 25 characters (e.g. year 10000)
[edit] Example
#include <ctime> #include <iostream> int main() { std::time_t result = std::time(NULL); std::cout << std::ctime(&result); }
Output:
Tue Dec 27 17:21:29 2011
[edit] See also
| converts a tm 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 ctime
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