C Program to demonstrate time functions.

C Program to demonstrate time functions. time.h library function is used to get and manipulate date and time functions. Read more about C Programming Language .

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#include <stdio.h> /* NULL */
#include <time.h> /* ctime, asctime */

time_t now; /* define 'now'. time_t is probably
* a typedef */

/* Calender time is the number of
* seconds since 1/1/1970 */

now = time((time_t *)NULL); /* Get the system time and put it
* into 'now' as 'calender time' */

printf("%s", ctime(&now)); /* Format data in 'now'
* NOTE that 'ctime' inserts a
* 'n' */


/* Here is another way to extract the time/date information */


printf("%s", ctime(&now)); /* Format data in 'now' */


struct tm *l_time;

l_time = localtime(&now); /* Convert 'calender time' to
* 'local time' - return a pointer
* to the 'tm' structure. localtime
* reserves the storage for us. */
printf("%s", asctime(l_time));


printf("%s", asctime(localtime( &now )));


struct tm *l_time;
char string[20];

l_time = localtime(&now);
strftime(string, sizeof string, "%d-%b-%yn", l_time);
printf("%s", string);

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