C Tutorial/time.h/time

time

Item Value Header file time.h Declaration time_t time(time_t *time); Return returns the current calendar time of the system or -1 if the system has no time.

The time() function can be called either with a null pointer or with a pointer to a variable of type time_t.

If the latter is used, the variable will also be assigned the calendar time.

<source lang="cpp">#include <time.h>

 #include <stdio.h>
 int main(void)
 {
   struct tm *ptr;
   time_t lt;
   lt = time(NULL);
   ptr = localtime(&lt);
   printf(asctime(ptr));
   return 0;
 }</source>