GNU C Library (libc) Programming Guide - Time Functions Example

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
 
 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);
 
 /* 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.