Timestamp

Kode 

#include <time.h>
#include <stdio.h>
#include <string.h>

int main(void)
{
   time_t Time;
   struct tm TMStruct;
   memset(&TMStruct, 0, sizeof(TMStruct));

   TMStruct.tm_year = 2004 - 1900;
   TMStruct.tm_mon = 6;
   TMStruct.tm_mday = 4;
   Time = mktime(&TMStruct);
   printf("Seconds %u", (int )Time);

   return 0;
}

Noget i stil med:

Kode 

#include <time.h>
#include <stdio.h>
#include <string.h>

int main(void)
{
   time_t Time;
   struct tm TMStruct;
   memset(&TMStruct, 0, sizeof(TMStruct));

   TMStruct.tm_year = 2004 - 1900;
   TMStruct.tm_mon = 6;
   TMStruct.tm_mday = 4;
   Time = mktime(&TMStruct);
   printf("Seconds %u", (int )Time);

   return 0;
}

Jeg er ikke sikker på at standarden garanterer at Time er i sekunder fra 1/1 1970 men det er det almindelige.

Se f.ex:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_mktime.asp