C库函数 mktime()

#include <stdio.h>

#include <time.h>



int main () {

   int ret;

   struct tm info;

   char buffer[80];



   info.tm_year = 2001 - 1900;

   info.tm_mon = 7 - 1;

   info.tm_mday = 4;

   info.tm_hour = 0;

   info.tm_min = 0;

   info.tm_sec = 1;

   info.tm_isdst = -1;



   ret = mktime(&info);

   if( ret == -1 ) {

      printf("Error: unable to make time using mktime\n");

   } else {

      strftime(buffer, sizeof(buffer), "%c", &info );

      printf(buffer);

   }



   return(0);

}