# include <stdio.h>

//
//  Program 9.5, Stephen Kochan, Programming in C.
//
struct time
{
  int hour;
  int minutes;
  int seconds;
};

int main ( void );
struct time timeUpdate ( struct time now );

int main ( void )
{
  struct time currentTime, nextTime;

  printf ( "Enter the time (hh:mm:ss): " );
  scanf ( "%i%i%i", &currentTime.hour, &currentTime.minutes, 
    &currentTime.seconds );

  nextTime = timeUpdate ( currentTime );

  printf ( "Updated time is %.2i:%.2i.%.2i\n", nextTime.hour,
    nextTime.minutes, nextTime.seconds );

  return 0;
}

struct time timeUpdate ( struct time now )
{
  now.seconds = now.seconds + 1;

  if ( now.seconds == 60 )
  {
    now.seconds = 0;
    now.minutes = now.minutes + 1;
    if ( now.minutes == 60 )
    {
      now.minutes = 0;
      now.hour = now.hour + 1;
      if ( now.hour == 24 )
      {
        now.hour = 0;
      }
    }
  }
  return now;
}