C++ 计算两个TDateTime之间的时间，扭曲

我需要找出如何获得2次之间的时间，但前提是时间在工作时间内（存储在数据库中）

这是我现在得到的，但它是完全错误的。总数是不正确的

int __fastcall Organisasjon::CalculateResponsetimeInOpeninghours(std::auto_ptr<DBCommand> cmd, long orgid, TDateTime starttimeIn, TDateTime endtimeIn)
{
int totalTimeInQueue = 0;
String sIsWorkDay = "";

String s  =  "SELECT o.isworkday, o.workdate, o.workstarttime, o.workendtime " \
                 "FROM orgwdexcep o " \
                 "WHERE o.workdate = :date " \
                 "AND o.orgid = :orgid ";
String s2 =  "SELECT o.isworkday, o.workdate, o.workstarttime, o.workendtime " \
                 "FROM globalwodexcep o " \
                 "WHERE o.workdate = :date ";
String s3 =  "SELECT o.workstarttime, o.workendtime " \
                 "FROM organizationworkday o " \
                 "WHERE o.weekdayindex = :weekdayindex " \
                 "AND o.orgid = :orgid ";
double MailThisDayStart = starttimeIn;
double MailThisDayEnd = endtimeIn;

while ((int)MailThisDayStart <= (int)endtimeIn)
{//for each day i period.
    if((int)MailThisDayStart != (int)endtimeIn)
    {
        MailThisDayEnd = (double)((long)MailThisDayEnd) + 1;
}
    cmd->setCommandText(s);
    cmd->Param( "date" ).setAsDateTime() = DBDatabase::ConvertToSADateTime(MailThisDayStart);
    cmd->Param("orgid").setAsLong() = orgid;
    cmd->Execute();
    if (!(cmd->isResultSet() && cmd->FetchNext()))
    {
        cmd->setCommandText(s2);
        cmd->Param( "date" ).setAsDateTime() = DBDatabase::ConvertToSADateTime(MailThisDayStart);
        cmd->Execute();
    }
    if(cmd->isResultSet() && cmd->FetchNext())
    {
      sIsWorkDay = String(cmd->Field("isworkday").asString());
    }
    else
    {
        int dayOfTheWeek = DayOfTheWeek(MailThisDayStart);
        cmd->setCommandText(s3);
        cmd->Param("weekdayindex").setAsLong() = dayOfTheWeek;
        cmd->Param("orgid").setAsLong() = orgid;
        cmd->Execute();
        if(cmd->isResultSet() && cmd->FetchNext())
        {
            sIsWorkDay = "T";
  }
    }
    if(sIsWorkDay == "T")
    {
        TDateTime tmpOpeningStart =  TDateTime(cmd->Field("workstarttime").asDateTime());
        TDateTime tmpOpeningEnd = TDateTime(cmd->Field("workendtime").asDateTime());
        double dtmpOpeningStart = tmpOpeningStart- (int)tmpOpeningStart;
        double dtmpOpeningEnd = tmpOpeningEnd- (int)tmpOpeningEnd;

        totalTimeInQueue +=  Organisasjon::CountHours(MailThisDayStart, MailThisDayEnd, dtmpOpeningStart, dtmpOpeningEnd,(int)MailThisDayStart);
    }
    MailThisDayStart++;//increase date by one
    MailThisDayStart = (double)((long)MailThisDayStart);
}
return totalTimeInQueue;
}

int __fastcall Organisasjon::CountHours(double MailTimeStart, double MailTimeEnd, double openingTimeStart, double openingTimeEnd, int DayToCompute)
{
   if(MailTimeEnd<openingTimeStart)
   {
       return 0;
       }
   if(MailTimeStart<(DayToCompute+openingTimeStart))
   {
       MailTimeStart=openingTimeStart;
   }
   else
   {
        MailTimeStart=MailTimeStart-(int)MailTimeStart;
   }
   if(MailTimeEnd>(DayToCompute+openingTimeEnd))
   {
    MailTimeEnd=openingTimeEnd;
   }
   else
   {
    MailTimeEnd=MailTimeEnd-(int)MailTimeEnd;
   }
   TDateTime dt = TDateTime((MailTimeEnd - MailTimeStart));
   unsigned short milli;
   unsigned short sec;
   unsigned short min;
   unsigned short hour;
   dt.DecodeTime(&hour,&min,&sec,&milli);
   int total = hour*3600;
   total += min*60;
   total += sec;
   return total;
}

int\uu fastcall organisaJon:：CalculateResponsetTimeInOpeningHours（std:：auto\u ptr cmd，long orgid，TDateTime starttimeIn，TDateTime endtimeIn）
{
int totalTimeInQueue=0；
字符串sIsWorkDay=“”；
String s=“选择o.isworkday、o.workdate、o.workstarttime、o.workendtime”\
“来自OrgWDO”\
“其中o.workdate=：日期”\
“和o.orgid=：orgid”；
String s2=“选择o.isworkday、o.workdate、o.workstarttime、o.workendtime”\
“来自globalwodexcep o”\
“其中o.workdate=：日期”；
字符串s3=“选择o.workstarttime，o.workendtime”\
“来自组织工作日o”\
“其中o.weekdayindex=：weekdayindex”\
“和o.orgid=：orgid”；
double MailThisDayStart=starttimeIn；
double MailThisDayEnd=endtimeIn；
while（（int）MailThisDayStart setCommandText）；
cmd->Param（“date”）.setAsDateTime（）=DBDatabase:：ConvertToSADateTime（MailThisDayStart）；
cmd->Param（“orgid”）.setAsLong（）=orgid；
cmd->Execute（）；
如果（！（cmd->isResultSet（）&&cmd->FetchNext（））
{
cmd->setCommandText（s2）；
cmd->Param（“date”）.setAsDateTime（）=DBDatabase:：ConvertToSADateTime（MailThisDayStart）；
cmd->Execute（）；
}
如果（cmd->isResultSet（）&&cmd->FetchNext（））
{
sIsWorkDay=String（cmd->Field（“isworkday”）.asString（）；
}
其他的
{
int DayOfWeek=星期几（MailThisDayStart）；
cmd->setCommandText（s3）；
cmd->Param（“weekdayindex”）.setAsLong（）=DayOfWeek；
cmd->Param（“orgid”）.setAsLong（）=orgid；
cmd->Execute（）；
如果（cmd->isResultSet（）&&cmd->FetchNext（））
{
sIsWorkDay=“T”；
}
}
如果（工作日=“T”）
{
TDateTime tmpOpeningStart=TDateTime（cmd->Field（“workstarttime”）.asDateTime（）；
TDateTime tmpOpeningEnd=TDateTime（cmd->Field（“workendtime”）.asDateTime（）；
双dtmpopenstart=tmpOpeningStart-（int）tmpOpeningStart；
双dtmpopenend=tmpopengingend-（int）tmpopengingend；
totalTimeInQueue+=OrganizasJon:：CountHours（MailThisDayStart、MailThisDayEnd、dtmpOpeningStart、dtmpOpeningEnd，（int）MailThisDayStart）；
}
MailThisDayStart++；//将日期增加一个
MailThisDayStart=（双）（（长）MailThisDayStart）；
}
返回totalTimeInQueue；
}
int\uu fastcall OrganizasJon:：CountHours（double MailTimeStart、double MailTimeEnd、double openingTimeStart、double openingTimeEnd、int DayToCompute）
{
如果（MailTimeEnd您希望在
总计中看到什么

试试这个例子：

TDateTime MailTimeEnd = TDateTime::CurrentTime();;
MailTimeEnd += 1.0 / 24;
TDateTime MailTimeStart = TDateTime::CurrentTime();
TDateTime dt = TDateTime((MailTimeEnd - MailTimeStart));
unsigned short milli;
unsigned short sec;
unsigned short min;
unsigned short hour;
dt.DecodeTime(&hour,&min,&sec,&milli);
int total = hour*3600;
total += min*60;
total += sec;

total==3600
。这是正确的。
总数应该是电子邮件在队列中等待的总秒数，但只应包括工作时间内的秒数。电子邮件可能在队列中等待了数天，因此算法需要每天检查打开小时数。workstarttime和workendtime字段是否存储工作时间我们的或电子邮件的持续时间？workstarttime和workendtime存储组织在给定日期的开放时间，organizationworkday如下所示：id、orgId、weekDay、workstarttime、workendtime。方法TDateTime starttimeIn的参数，TDateTime endtimeIn是电子邮件首次在系统中注册的时间，endtime是有人回答的时间。