C++ C字符串与time_c和time_c与C字符串之间的转换

http://cyanman.blog.163.com/blog/static/15250208200892501645480/

方法1， SYSTEMTIME 类型

//指定time_t类型的时间，格式化为YYYYMMDDHH24MISS型的字符串
void FormatTime(SYSTEMTIME &tm1)
{
  TCHAR * szTime = new TCHAR[128];
  GetLocalTime(&tm1);
  _stprintf( szTime, _T("%4.4d-%2.2d-%2.2d %2.2d:%2.2d:%2.2d"),

     tm1.wYear, tm1.wMonth+1, tm1.wDay,
     tm1.wHour, tm1.wMinute,tm1.wSecond);
  
  delete szTime;
  szTime = NULL;
}

//指定YYYYMMDDHH24MISS型的时间，格式化为time_t型的时间
SYSTEMTIME FormatTime2(TCHAR * szTime)
{
  SYSTEMTIME tm1;
  _stscanf( szTime, _T("%4d-%2d-%2d %2d:%2d:%2d"),  
    &tm1.wYear,
    &tm1.wMonth,
    &tm1.wDay,
    &tm1.wHour,
    &tm1.wMinute,
    &tm1.wSecond );
    return time1;
}

方法2， time_t类型
//指定time_t类型的时间，格式化为YYYYMMDDHH24MISS型的字符串
void FormatTime(time_t time1, char *szTime)
{
    struct tm tm1;

#ifdef WIN32
    tm1 = *localtime(&time1);
#else
    localtime_r(&time1, &tm1 );
#endif
    sprintf( szTime, "%4.4d%2.2d%2.2d%2.2d%2.2d%2.2d",
           tm1.tm_year+1900, tm1.tm_mon+1, tm1.tm_mday,
             tm1.tm_hour, tm1.tm_min,tm1.tm_sec);
}

//指定YYYYMMDDHH24MISS型的时间，格式化为time_t型的时间
time_t FormatTime2(char * szTime)
{
    struct tm tm1;
    time_t time1;

    sscanf(szTime, "%4d%2d%2d%2d%2d%2d",   
          &tm1.tm_year,
          &tm1.tm_mon,
          &tm1.tm_mday,
          &tm1.tm_hour,
          &tm1.tm_min,
          &tm1.tm_sec);
       
    tm1.tm_year -= 1900;
     tm1.tm_mon --;

    tm1.tm_isdst=-1;
 
    time1 = mktime(&tm1);
    return time1;
}