diff options
Diffstat (limited to 'Semestr 2/racket/lista6/zad11')
-rw-r--r-- | Semestr 2/racket/lista6/zad11/solution.bak | 36 | ||||
-rw-r--r-- | Semestr 2/racket/lista6/zad11/solution.rkt | 58 |
2 files changed, 0 insertions, 94 deletions
diff --git a/Semestr 2/racket/lista6/zad11/solution.bak b/Semestr 2/racket/lista6/zad11/solution.bak deleted file mode 100644 index f449481..0000000 --- a/Semestr 2/racket/lista6/zad11/solution.bak +++ /dev/null @@ -1,36 +0,0 @@ -#lang racket - -(provide (struct-out const) (struct-out binop) rpn->arith) - -;; ------------------------------- -;; Wyrazenia w odwr. not. polskiej -;; ------------------------------- - -(define (rpn-expr? e) - (and (list? e) - (pair? e) - (andmap (lambda (x) (or (number? x) (member x '(+ - * /)))) - e))) - -;; ---------------------- -;; Wyrazenia arytmetyczne -;; ---------------------- - -(struct const (val) #:transparent) -(struct binop (op l r) #:transparent) - -(define (arith-expr? e) - (match e - [(const n) (number? n)] - [(binop op l r) - (and (symbol? op) (arith-expr? l) (arith-expr? r))] - [_ false])) - -;; ---------- -;; Kompilacja -;; ---------- - -(define (rpn->arith e) - (error "TODO: Uzupelnij tutaj")) - -; Mozesz tez dodac jakies procedury pomocnicze i testy
\ No newline at end of file diff --git a/Semestr 2/racket/lista6/zad11/solution.rkt b/Semestr 2/racket/lista6/zad11/solution.rkt deleted file mode 100644 index a44afe4..0000000 --- a/Semestr 2/racket/lista6/zad11/solution.rkt +++ /dev/null @@ -1,58 +0,0 @@ -#lang racket - -(provide (struct-out const) (struct-out binop) rpn->arith) - -;; ------------------------------- -;; Wyrazenia w odwr. not. polskiej -;; ------------------------------- - -(define (rpn-expr? e) - (and (list? e) - (pair? e) - (andmap (lambda (x) (or (number? x) (member x '(+ - * /)))) - e))) - -;; ---------------------- -;; Wyrazenia arytmetyczne -;; ---------------------- - -(struct const (val) #:transparent) -(struct binop (op l r) #:transparent) - -(define (arith-expr? e) - (match e - [(const n) (number? n)] - [(binop op l r) - (and (symbol? op) (arith-expr? l) (arith-expr? r))] - [_ false])) - -;; ---------- -;; Kompilacja -;; ---------- - -(struct stack (xs)) - -(define empty-stack (stack null)) -(define (empty-stack? s) (null? (stack-xs s))) -(define (top s) (car (stack-xs s))) -(define (push a s) (stack (cons a (stack-xs s)))) -(define (pop s) (stack (cdr (stack-xs s)))) - -(define (op->proc op) - (match op ['+ +] ['- -] ['* *] ['/ /])) - -(define (eval-am e s) - (cond [(null? e) - (top s)] - [(number? (car e)) - (eval-am (cdr e) (push (const (car e)) s))] - [(symbol? (car e)) - (eval-am (cdr e) - (push (binop (car e) (top (pop s)) (top s)) - (pop (pop s))))])) - -(define (rpn->arith e) - (eval-am e empty-stack)) - - -; Mozesz tez dodac jakies procedury pomocnicze i testy
\ No newline at end of file |