Just another update

Task/Generator-Exponential/Scheme/generator-exponential.ss

@@ -0,0 +1,27 @@
+(define (power-seq n)
+  (let ((i 0))
+    (lambda ()
+      (set! i (+ 1 i))
+      (expt i n))))
+
+(define (filter-seq m n)
+  (let* ((s1 (power-seq m)) (s2 (power-seq n))
+			    (a 0) (b 0))
+    (lambda ()
+      (set! a (s1))
+      (let loop ()
+	(if (>= a b) (begin
+		       (cond ((> a b) (set! b (s2)))
+			     ((= a b) (set! a (s1))))
+		       (loop))))
+      a)))
+
+(let loop ((seq (filter-seq 2 3)) (i 0))
+  (if (< i 30)
+    (begin
+      (if (> i 20)
+	(begin
+	  (display (seq))
+	  (newline))
+	(seq))
+      (loop seq (+ 1 i)))))