20 lines
405 B
Racket
20 lines
405 B
Racket
#lang br
|
|
(provide (prefix-out Nand- (all-defined-out)))
|
|
(require "helper.rkt")
|
|
|
|
(define a (make-bus))
|
|
(define b (make-bus))
|
|
|
|
|
|
(define (out . etc)
|
|
(if (< (+ (a) (b)) 2)
|
|
1
|
|
0))
|
|
|
|
(module+ test
|
|
(require rackunit)
|
|
(check-equal? (begin (a 0) (b 0) (out)) 1)
|
|
(check-equal? (begin (a 0) (b 1) (out)) 1)
|
|
(check-equal? (begin (a 1) (b 0) (out)) 1)
|
|
(check-equal? (begin (a 1) (b 1) (out)) 0))
|