在线请教一个time_t的问题

Question

struct tm *TimeBegin=NULL;   
    TimeBegin->tm_year=2005;
    TimeBegin->tm_mon=1;
    TimeBegin->tm_mday=1;
    TimeBegin->tm_hour=0;
    TimeBegin->tm_min=0;
    TimeBegin->tm_sec=0;
我这么直接赋值不行,出错,请问应该怎么赋值呢,谢谢

Answer 1

// crt_mktime.c
/* The example takes a number of days
 * as input and returns the time, the current
 * date, and the specified number of days.
 */#include <time.h>
#include <stdio.h>int main( void )
{
   struct tm when;
   __time64_t now, result;
   int    days;   _time64( &now );
   when = *_localtime64( &now );
   printf( "Current time is %s\n", asctime( &when ) );
   days = 20;
   when.tm_mday = when.tm_mday + days;
   if( (result = _mktime64( &when )) != (time_t)-1 )
      printf( "In %d days the time will be %s\n", 
              days, asctime( &when ) );
   else
      perror( "_mktime64 failed" );
}

Answer 2

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

Answer 3

struct tm *TimeBegin=new tm ;