Ctime related functions

Day duration: the number of seconds from 00:00:00, January 1, January 1, 1970, UTC time.

Decomposition: struct TM structure.

 

Time_t time (time_t * timer); // obtain the calendar time.

Struct TM * gmtime (const time_t * timer); // The GMT time for the duration of the decomposition.

Struct TM * localtime (const time_t * timer); // The local time when the log is decomposed.

Char * asctime (const struct TM * timeptr); // when splitting-> string, directly enter the TM structure data into the string

Char * ctime (const time_t * timer); // calendar-> string, displayed according to local time zone

Double difftime (time_t time1, time_t time0); // calculate the time difference

Time_t mktime (struct TM * timeptr); // Decomposition Time-> day duration, which is interpreted as the local time zone