Re: simple london underground query system

On 9 Aug 2006 07:22:21 -0700, "sheddy" <andysheard@xxxxxxxxxxxxxx>
wrote:

Thanks again

But how do i set it up so i can find out the time between stations?
Thats the part im really stuck on.

I know how to get the time between two station that are next to each
other. How do i accumulate a time though if the stations more than one
stop away?

Sheddy

Hm.... It seems simple: A->B->C then time(A, C) = time(A, B) +
time(B, C)

You have to cumulate time when you do graph traversal or you can
calculate time when you find the path.

I am not going to write program to show you how to do this. There is
enough free materials about Prolog available on the Internet. You
can start from here

http://www.csupomona.edu/~jrfisher/www/prolog_tutorial/contents.html

You can see also here

http://www.informatik.uni-freiburg.de/~ml/teaching/ws02/lll/lll2_small.pdf

Have fun with your homework!

A.L.
.

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