SICP Exercise 3.28
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SICP Exercise 3.28
This exercise is easy.
;Exercise 3.28(define (or-gate in1 in2 out) (define (and-action-procedure) (let ((new-value (logic-or (get-signal in1) (get-signal in2)))) (after-delay or-gate-delay (lambda () (set-signal! out new-value))))) (add-action! in1 and-action-procedure) (add-action! in2 and-action-procedure) 'ok)
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