I am currently working on Structure Definitions and am hoping that I can get some feedback through this mailing list on whether I am doing things correctly or not.
*Exercise 6.4.3.* Provide a structure definition and a data definition for representing three-letter words. A word consists of letters, which we represent with the symbols 'a through 'z. Here is what I have come up with. ;; word : symbol -> symbol ; produce a word with the letters it's made of. ; word is a structure ; (make-word first-letter second-letter third-letter) ; where first-letter, second-letter, and third-letter are symbols 'a thru z' (define-struct word (first-letter second-letter third-letter)) (define cat (make-word 'c 'a 't)) Using the interactive prompt I can do the following: > (word-first-letter cat) 'c > (word-third-letter cat) 't
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