C Tutorial/time.h/mktime
mktime
Item Value Header file time.h Declaration time_t mktime(struct tm *time); Return returns the calendar-time equivalent of the broken-down time.
#include <time.h>
#include <stdio.h>
int main(void)
{
struct tm t;
time_t t_of_day;
t.tm_year = 2005-1900;
t.tm_mon = 0;
t.tm_mday = 3;
t.tm_hour = 0; /* hour, min, sec don"t matter */
t.tm_min = 0; /* as long as they don"t cause a */
t.tm_sec = 1; /* new day to occur */
t.tm_isdst = 0;
t_of_day = mktime(&t);
printf(ctime(&t_of_day));
return 0;
}