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; Copyright (c) 1993-2008 by Richard Kelsey. See file COPYING.
(define-local-syntax (define-primitive id nargs)
(let ((args (reverse (list-tail '(z y x) (- '3 nargs)))))
`(define (,id . ,args)
(call-primitively ,id . ,args))))
(define-primitive + 2)
(define-primitive - 2)
(define-primitive * 2)
(define-primitive < 2)
(define-primitive make-vector 2)
(define-primitive pointer-add 2)
(define-primitive contents 1)
(define-primitive set-contents! 2)
(define *current-input-port*
(call-primitively stdin))
(define *current-output-port*
(call-primitively stdout))
(define (current-input-port)
*current-input-port*)
(define (current-output-port)
*current-output-port*)
(define (vector-ref vec index)
(contents (pointer-add vec index)))
(define (vector-set! vec index value)
(set-contents! (pointer-add vec index) value))
(define (default y) y)
(define do-it (make-vector 5 default))
(define (add-entry i k)
(vector-set! do-it i (lambda (x) (+ x k))))
(add-entry 0 1)
;(add-entry 1 1)
(add-entry 2 3)
(add-entry 3 4)
(add-entry 4 4)
(define (test x)
((vector-ref do-it x) 5))
(define (main)
(write-number (test (read-number (current-input-port)))
(current-output-port)))
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