↑ ABC: Program Examples

Some of these articles are followed by a link to a source file for the program. These source files were produced by using the 'abc -p' option for packing a workspace. To unpack it in your own workspaces, save the file as F, choose the name of your new workspace W, and say:

abc -u -w W F

(you may freely choose the names W and F, but avoid using an existing workspace name for W).

• A Telephone List
• A Cross-reference Indexer
• An Adventure Game (source)
• Grammar Analysis (source)
• Logic Programming
• Approximate Numbers
• A solution to the Eight Queens problem
• A general-purpose database program
• The source of a version of Joseph Weizenbaum's Eliza program, as presented in the ABC Programmers' Handbook. For more details of how the program works, see the book.

  To use Eliza interactively, just run the command ELIZA.

  To watch Eliza talking to someone else, run the command

  SESSION grammar

  where 'grammar' is some grammar to generate English sentences. There is only one such grammar supplied, paranoid, so you say:

  SESSION paranoid

  If the grammar is empty, then Eliza tries to psychoanalyse herself:

  SESSION {}

  To quote from her interacting with herself:

  > Do you enjoy this sort of interaction?
  What a question!