diff options
Diffstat (limited to 'src/test/hanoi.lisp')
| -rw-r--r-- | src/test/hanoi.lisp | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/test/hanoi.lisp b/src/test/hanoi.lisp index e873c796..02e16876 100644 --- a/src/test/hanoi.lisp +++ b/src/test/hanoi.lisp @@ -41,7 +41,8 @@ (define towers ()) -(define 1- (lambda (x) (- x 1))) +(define one- (lambda (x) (- x 1))) +(define one+ (lambda (x) (+ x 1))) ; Display one tower, clearing any ; space above it @@ -49,13 +50,13 @@ (cond ((= 0 clear) (cond ((not (null? tower)) (display-string x y (car tower)) - (display-tower x (1+ y) 0 (cdr tower)) + (display-tower x (one+ y) 0 (cdr tower)) ) ) ) (else (display-string x y " ") - (display-tower x (1+ y) (1- clear) tower) + (display-tower x (one+ y) (one- clear) tower) ) ) ) @@ -106,7 +107,7 @@ (define replace (lambda (list pos member) (cond ((= pos 0) (cons member (cdr list))) - ((cons (car list) (replace (cdr list) (1- pos) member))) + ((cons (car list) (replace (cdr list) (one- pos) member))) ) ) ) @@ -125,7 +126,7 @@ (set! towers (replace towers from from-tower)) (set! towers (replace towers to to-tower)) (display-hanoi) -; (delay move-delay) + (delay move-delay) ) ) ) @@ -137,9 +138,9 @@ (move-piece from to) ) (else - (_hanoi (1- n) from use to) + (_hanoi (one- n) from use to) (_hanoi 1 from to use) - (_hanoi (1- n) use to from) + (_hanoi (one- n) use to from) ) ) ) |