Date/Time differences

[Robert E. Carneal]

In power basic for Dos, how does one perform date/time
calculations?

For example, can I:
Tyme1$=15:30:45
Tyme2$=13:22:05

Tyme3$=Tyme1$-Tyme2$
How can I get Tyme3$ to equal 01:08:40 ?

Same deal with dates?
Dayte1$=20030215 :'format YYYYMMDD
Dayte2$=20030101
Dayte3$=Dayte1$-Dayte2$
I would like for Dayte3$ to equal 14 days in some fashion. Is
this possible? I have pulled out about a handful of hair to
make this work.

This is for employee time clock funtions and calculating
interest.

Thank you.

Robert

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[Ian Cairns]

robert,
this posting, although initially designed with the windows compiler in mind, still gives everything you need to do what you want.

easter calculation

regards,

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[email protected]

[Tom Hanlin]

See DateUnit.bas in your PBDOS35\Examples directory.

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Tom Hanlin
PowerBASIC Staff

[Robert E. Carneal]

Tom- well, I will be.... I +do+ have it.

I guess at some point in time, the Examples directory was
deleted. I found it by reinstalling PB for dos.

Thanks.

Robert

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[Robert E. Carneal]

Tom-

Whups, I see in the Dateunit.bas the dates should be between
01-01-1900 and 06-05-2079.

Uh, what would be involved in making that 01-01-1400?!?

Reason: I am a family genealogist, and my oldest person is 1504,
and I hope to go even before that.

I bet your answer is "no earthly way!," but if it can be done at
all, I would appreciate knowing how. 100 percent precision
accuracy is not mandatory- the information I have might be a
month off.

I am aware of the Calendar conversion problems, but I try to
convert all dates to the present calendar system.

Thank you.

Robert

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[Tom Hanlin]

It probably wouldn't be difficult to change the starting point but,
I don't know the qualifications offhand. It's not completely arbitrary.

You might check out other solutions in the Download area here.
http://www.powerbasic.com/files/pub/pbdos/library/

Egbert Zijlema has also done some good work with date handling:
http://zijlema.basicguru.com/

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Tom Hanlin
PowerBASIC Staff

[Don Schullian]

i just posted some date code here. i think it will still work for dos. if not, give me a shout and i'll root around for the dos version.
http://www.powerbasic.com/support/pb...ead.php?t=7522

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c'ya
d83