[RESOLVED] Milliseconds using ColeDateTime

According to MSDN, ColeDateTime has resolution of 1 millisecond but when I try to use add 0.002 seconds to a ColeDateTime object and try to output the seconds using GetSecond(), I still get an integer of seconds.

Can I print the milliseconds instead?

I did do some google search but couldn't find a definite answer. My problem is I have two times given tstart 11:13:26.001 (11am, 13 min, 26 second, 1 milliseconds) and tend in format like 11:17:13.001. I want to get times every 0.002 seconds between tstart and tend.

Thanks

Is this problem that hard that there have been more than 50 views and still no could answer it.

1. GetSecond() returns the integer second between 0 and 59 ... it
has nothing to do with millisec.

2) you mentioned that you added 0.002 milliseconds. How did you
do that ? If you add 0.002 to a COleDateTime object, that
is the same as adding 172.8 seconds. ( adding 1.0 = 24 hours , not
1 second).

3) It is not clear why you are using COleDateTime for this (at
least not to me).

4) you can use the m_dt data member to get the date/time (the fractional
part is the time ... as a fraction of 24 hours. So if the fractional part
is 0.5, that is 12 hours).

Beside what Philip Nicoletti already stated.

Indeed, MSDN notes that COleDateTime keeps the time with an approximate resolution of 1 millisecond (better said, its underlying DATE member can do that).
MSDN: Date and Time: Automation Support
However (keeping an eye on "approximate" word above) the COleDateTime is designed to work with a resolution of 1 second.
Probably, if someone tries to extend it for dealing with a higher resolution will get (floating point) calculation errors.
Anyhow, there is not a good ideea to directly modify COleDateTime::m_dt.

So,

1. Use COleDateTime for a maximum resolution of 1 second.
2. Do not directly modify COleDateTime::m_dt; instead, call COleDateTime methods or use COleDateTimeSpan to add relative time.

If you need resolution of 1 millisecond, then write your own classes keeping, for example, a SYSTEMTIME structure.
It's a little bit to sweat but, that's it! ;)

I do not have to use ColeDateTime but that is the only thing I came across with a working example. So, I implemented in my code.

So, is there any example code for m_dt which plays with milliseconds. I am looking for a very simple example like sets some time in milliseconds, adds another milliseconds to it and then gets hour, minute, second, milliseconds from new time.

Also while using ColeDateTime when I add 0.02 second ofcourse myseconds do not change.

Thanks

I think this is the solution since I can't use Boost:

http://www.codeproject.com/KB/datetime/hightime.aspx

But would love to hear your opinion about the above if you have any.

The CHightime gives build erros with Visual Studio 2010 and I am not the only one having it.

Ok if I try to use the prvious suggestion about SYSTEM time to write my own code, how do I do it.

I want to give in a specified time and be able to add 0.002 milliseconds and get new time. But using SYSTEM time I do not see any constructor where I can specify my supplied time.

Any hint is appreciated.

Quote:

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Originally Posted by Learned

The CHightime gives build erros with Visual Studio 2010 and I am not the only one having it.

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What build errors?
Could you please post your test project that failed to build here?

I wrote my own millisecond handler which still uses ColeDateTime but the kind of errors I was getting are:
xxx needs ';' before xxx, etc and the errors were in files which I downloaded from code project website. And there were tonnes of such error.

I will just consider this thread as resolved since I am not prusuing this path anymore.

Quote:

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Originally Posted by VladimirF

What build errors?
Could you please post your test project that failed to build here?

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Hi
I have similar compilation errors.
Can anyone help if I post the errors here?

Quote:

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Originally Posted by Azeem.tp

Hi
I have similar compilation errors.
Can anyone help if I post the errors here?

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Just post it and we will try to help...