mktime

From cppreference.com
< c | chrono
Defined in header <time.h>
time_t mktime( tm* time );

Converts local calendar time to a time since epoch as a time_t object, ignoring the values of time->tm_wday and time->yday. The values of other components of time are not restricted to their usual ranges. A negative value of time->tm_isdst causes mktime to attempt to determine if Daylight Saving Time was in effect.

If successful, recalculates and updates all fields in time to fit their proper ranges.

Contents

[edit] Parameters

time - pointer to a tm object specifying local calendar time to convert

[edit] Return value

time since epoch as a time_t object on success or -1 if time cannot be represented as a time_t object.

[edit] Example

[edit] See also

converts time since epoch to calendar time expressed as local time
(function)