exercises and notes from "Gentle introduction"

FSMs.lisp

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+
+;; exmple of FSM
+;; vending machine
+;; - gum :: 15 cents
+;; - mints :: 20 cents
+;; any combination of
+;; DIME - 10c
+;; NICKEL - 5c
+;; if enough money is in, press of either button would get you the product and change
+;; pressing coin return at any time will return amount equal to being put in so far
+
+;;; and the exercise is to use macro to compile FSM with functions for states, from defstate & defarc structures
+;; that seems cool