From ea6a6b914f2d4d79a5cc819e1e29d461e9a211f3 Mon Sep 17 00:00:00 2001
From: rsiddharth <s@ricketyspace.net>
Date: Sat, 3 Feb 2018 05:39:35 +0000
Subject: Add net/ricketyspace/sicp/one/thirtyeight.scm.

---
 net/ricketyspace/sicp/one/thirtyeight.scm | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 net/ricketyspace/sicp/one/thirtyeight.scm

(limited to 'net')

diff --git a/net/ricketyspace/sicp/one/thirtyeight.scm b/net/ricketyspace/sicp/one/thirtyeight.scm
new file mode 100644
index 0000000..be5288a
--- /dev/null
+++ b/net/ricketyspace/sicp/one/thirtyeight.scm
@@ -0,0 +1,19 @@
+;;;; Under Creative Commons Attribution-ShareAlike 4.0
+;;;; International. See
+;;;; <https://creativecommons.org/licenses/by-sa/4.0/>.
+
+(define-module (net ricketyspace sicp one thirtyeight)
+  #:use-module (net ricketyspace sicp one thirtyseven)
+  #:export (euler-minus-2))
+
+(define (euler-minus-2)
+  (define (n i) 1.0)
+  (define (d i) (cond ((= i 1) 1)
+                      ((= (remainder i 3) 2) (* (+ (quotient i 3) 1) 2))
+                      (else 1)))
+  (cont-frac-rec n d 21))
+
+;;; Guile REPL
+;;; scheme@(guile-user)> ,use (net ricketyspace sicp one thirtyeight)
+;;; scheme@(guile-user)> (euler-minus-2)
+;;; $25 = 0.7182818284590453
-- 
cgit v1.2.3