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- | ====Objective==== | ||
- | * Gain experience with logic programming. | ||
- | * Become familiar with Prolog. | ||
- | * Gain understanding of the declarative nature of prolog. | ||
- | |||
- | ====Installation==== | ||
- | |||
- | For this class, we use [[http://www.swi-prolog.org|SWI-Prolog]]. You can download binaries for a Windows or macOS system [[http://www.swi-prolog.org/download/stable|here]]. | ||
- | |||
- | Also, there is an unofficial tutorial for installation [[https://wwu-pi.github.io/tutorials/lectures/lsp/010_install_swi_prolog.html|here]]. | ||
- | |||
- | For Mac with [[http://brew.sh|Homebrew]] installed, you can do this command ([[http://stackoverflow.com/a/23904035/756329|info here]]): | ||
- | |||
- | <code>brew install swi-prolog</code> | ||
- | |||
- | For Ubuntu, you can do these commands: | ||
- | |||
- | <code> | ||
- | sudo add-apt-repository ppa:swi-prolog/stable | ||
- | sudo apt-get update | ||
- | sudo apt-get install swi-prolog | ||
- | </code> | ||
- | ====Deliverables==== | ||
- | |||
- | You will turn in two prolog programs (in separate files) that solve the following logic puzzles: | ||
- | |||
- | *{{sc330_f2016:rosiesroses.png?linkonly|Rosie's Roses}} ({{sc330_f2016:rosies-roses-key.pdf?linkonly|Solution}}) | ||
- | *{{sc330_f2016:schoolsout.png?linkonly|School's Out!}} ({{sc330_f2016:schools-out-key.pdf?linkonly|Solution}}) | ||
- | |||
- | To help you start, we've provided a [[smapleSolution.pl|sample solution]] to {{sc330_f2016:tie.png?linkonly|It's a tie}}. Use this as a model for your own Prolog solutions. | ||
- | |||
- | ====Notes==== | ||
- | *Note that there are links above to the solutions (not the Prolog code) for these two puzzles. We strong encourage taking a few minutes to solve these puzzles by hand so that you get a feel for how to solve them and the "facts" you're extracting from the clues in the puzzle. This will give you a better feel for what you need to encode in your Prolog solution as well helping you get a feel for what Prolog's trying to do under the hood. (And it's fun!) | ||
- | *Just copy and paste the all_different function. It simply checks to make sure each item in the list is unique. | ||
- | *Check spelling errors. There is no such thing as misspelled atoms. So speigel and spiegel are both valid but different. | ||
- | *Once you have a solution, just check whether it satisfies each of the numbered rules in the problem. | ||
- | *These problems make extensive use of the "not" operator, \+. | ||
- | * \+ works as you expect when all variables are completely bound. | ||
- | * If E contains unbound variables, \+E will try to find bindings to that will make E true. If Successful \+ will fail. | ||
- | * This lab is taken from [[http://www.cis.upenn.edu/~matuszek/cis554-2015/Assignments/prolog-1-logic-puzzles.html|this site]]. There may be additional resources there. |