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21.4.9 Time Functions Example

Here is an example program showing the use of some of the calendar time functions.

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

#define SIZE 256

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);

  /* 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;

It produces output like this:

Wed Jul 31 13:02:36 1991
Today is Wednesday, July 31.
The time is 01:02 PM.