glibc/manual/examples/strftim.c

/* Time Functions Example
   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.
*/

#include <time.h>
#include <stdio.h>

#define SIZE 256

int
main (void)
{
  char buffer[SIZE];
  time_t curtime;
  struct tm *loctime;

  /* Get the current time. */
  curtime = time (NULL);

  /* Convert it to local time representation. */
  loctime = localtime (&curtime);

  /* Print out the date and time in the standard format. */
  fputs (asctime (loctime), stdout);

/*@group*/
  /* Print it out in a nice format. */
  strftime (buffer, SIZE, "Today is %A, %B %d.\n", loctime);
  fputs (buffer, stdout);
  strftime (buffer, SIZE, "The time is %I:%M %p.\n", loctime);
  fputs (buffer, stdout);

  return 0;
}
/*@end group*/