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Defined in header <ctime> | ||
struct tm; | ||
Structure holding a calendar date and time broken down into its components.
Contents |
int tm_sec | seconds after the minute –[0, 61](until C++11)[0, 60](since C++11)[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) |
[0, 61] was a defect introduced in C89 and corrected in C99).BSD, GNU and musl C library support two additional members, which are standardized inPOSIX.1-2024.
long tm_gmtoff | seconds east of UTC (public member object) |
const char* tm_zone | timezone abbreviation (public member object) |
#include <ctime>#include <iostream> int main(){ std::tm tm{}; tm.tm_year=2022-1900; tm.tm_mday=1;std::mktime(&tm); std::cout<<std::asctime(&tm);// note implicit trailing '\n'}
Possible output:
Sat Jan 1 00:00:00 2022
| converts time since epoch to calendar time expressed as local time (function)[edit] | |
| converts time since epoch to calendar time expressed as Universal Coordinated Time (function)[edit] | |
C documentation fortm | |
