C/math.h/time

time: returns the current calendar time of the system or -1 if the system has no time

<source lang="cpp">

//Declaration: time_t time(time_t *time);

 #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;
 }
        

/* Sat Mar 3 16:12:48 2007

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      </source>