Re: Taking Time and Date from System in C

jacob navia said:

> Tameem wrote:
>> please tell me the program codes to add current date on C.
> 
> /* LOCALTIM.C: This program uses time to get the current time
>   * and then uses localtime to convert this time to a structure
>   * representing the local time. The program converts the result
>   * from a 24-hour clock to a 12-hour clock and determines the
>   * proper extension (AM or PM).
>   */
> 
> #include <stdio.h>
> #include <string.h>
> #include <time.h>
> 
> int main( void )
> {
>          struct tm *newtime;
>          char am_pm[] = "AM";
>          time_t long_time;
> 
>          time( &long_time );            /* Get time as long integer. */
>          newtime = localtime( &long_time ); /* Convert to local time. */
> 
>          if( newtime->tm_hour > 12 )        /* Set up extension. */
>                  strcpy( am_pm, "PM" );
>          if( newtime->tm_hour > 12 )        /* Convert from 24-hour */
>                  newtime->tm_hour -= 12;    /*   to 12-hour clock.  */
>          if( newtime->tm_hour == 0 )     /*Set hour to 12 if midnight.
*/
>                  newtime->tm_hour = 12;
> 
>          printf( "%.19s %s\n", asctime( newtime ), am_pm );
> return 0;
> }
 
Conceptually simpler (and making it much easier to customise the format), 
but requiring an extra array:

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

int main(void)
{
  char thetime[32] = {0};
  time_t long_time = time(NULL);
  struct tm *newtime = localtime(&long_time);
  strftime(thetime, sizeof thetime, "%Y-%m-%d %I:%M:%S%p", newtime);
  printf("%s\n", thetime);
  return 0;
}

-- 
Richard Heathfield <http://www.cpax.org.uk>
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