1 #define CLOCKS_PER_SEC 1000000
16 char *asctime(struct tm * tm);
18 char *ctime(time_t * clock);
19 double difftime(time_t t1, time_t t2);
20 struct tm *gmtime(time_t *clock);
21 struct tm *localtime(time_t *clock);
22 time_t mktime(struct tm * tm);
23 size_t strftime(char * buf, size_t bufsize, char * fmt,struct tm *tm);
24 time_t time(time_t * tloc);