t = localtime(&clock);
printf("%d/%d/%d ", t->tm_mon + 1, t->tm_mday, t->tm_year % 100);
printf("%d:%02d", t->tm_hour, t->tm_min);
t = localtime(&clock);
printf("%d/%d/%d ", t->tm_mon + 1, t->tm_mday, t->tm_year % 100);
printf("%d:%02d", t->tm_hour, t->tm_min);