From 6a4656f85a69d0e2b4ded89674e3fe54e87e2222 Mon Sep 17 00:00:00 2001
From: Correl Roush <correl@gmail.com>
Date: Wed, 11 Jun 2014 23:49:03 -0400
Subject: [PATCH] Add missing GCD example in 1.2.5

---
 1-2.org | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/1-2.org b/1-2.org
index 8c74c25..c14c6ea 100644
--- a/1-2.org
+++ b/1-2.org
@@ -375,7 +375,13 @@ layout: org
    #+END_SRC
    
 * 1.2.5: Greatest Common Divisors
-  
+  #+begin_src scheme :tangle yes
+    (define (gcd a b)
+      (if (= b 0)
+          a
+          (gcd b (remainder a b))))
+
+  #+end_src
 ** Exercise 1.20
    The process that a procedure generates is of
    course dependent on the rules used by the interpreter.  As an