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   time_t time(time_t *timer);
   double difftime(time_t time1,time_t time2);
   struct tm *gmtime(const time_t *timer);
   struct tm *localtime(const time_t *timer);
   char *asctime(const struct tm *timeptr);
   char *ctime(const time_t *timer);
   size_t strftime(char *s,size_t maxsize,const char *format,const struct tm *timeptr);
   time_t mktime(struct tm *timeptr);
   clock_t clock(void);
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char * asctime(const struct tm * timeptr);
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main()
{
time_t timep;
time (&timep);
printf("%s",asctime(gmtime(&timep)));
}
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