Defined in header <time.h> | ||
|---|---|---|
struct tm; |
Structure holding a calendar date and time broken down into its components.
| int tm_sec | seconds after the minute – [0, 61] (until C99)[0, 60] (since C99)[note 1] (public member object) |
| int tm_min | minutes after the hour – [0, 59] (public member object) |
| int tm_hour | hours since midnight – [0, 23] (public member object) |
| int tm_mday | day of the month – [1, 31] (public member object) |
| int tm_mon | months since January – [0, 11] (public member object) |
| int tm_year | years since 1900 (public member object) |
| int tm_wday | days since Sunday – [0, 6] (public member object) |
| int tm_yday | days since January 1 – [0, 365] (public member object) |
| int tm_isdst | Daylight Saving Time flag. The value is positive if DST is in effect, zero if not and negative if no information is available (public member object) |
The Standard mandates only the presence of the aforementioned members in either order. The implementations usually add more data-members to this structure.
#include <stdio.h>
#include <time.h>
int main(void)
{
struct tm start = {.tm_year=2022-1900, .tm_mday=1};
mktime(&start);
printf("%s", asctime(&start));
}Output:
Sat Jan 1 00:00:00 2022
|
(C23)(C11) | converts time since epoch to calendar time expressed as local time (function) |
|
(C23)(C11) | converts time since epoch to calendar time expressed as Coordinated Universal Time (UTC) (function) |
C++ documentation for tm |
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