Created
November 29, 2010 21:41
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Binary search guessing game from Land of Lisp book
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(defparameter *small* 1) | |
(defparameter *big* 100) | |
(defun guess-my-number () | |
(ash (+ *small* *big*) -1)) | |
(defun smaller () | |
(setf *big* (1- (guess-my-number))) | |
(guess-my-number)) | |
(defun bigger () | |
(setf *small* (1+ (guess-my-number))) | |
(guess-my-number)) | |
(defun start-over () | |
(setf *small* 1) | |
(setf *big* 100) | |
(guess-my-number)) |
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