From 443eb7e7c9025fc1b308204c020a04fdebaf5b58 Mon Sep 17 00:00:00 2001
From: Xueqiao Xu <xueqiaoxu@gmail.com>
Date: Mon, 23 Jul 2012 22:12:05 +0800
Subject: [PATCH] add: 3.68

---
 chapter3/3.68.scm | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 chapter3/3.68.scm

diff --git a/chapter3/3.68.scm b/chapter3/3.68.scm
new file mode 100644
index 0000000..72a9804
--- /dev/null
+++ b/chapter3/3.68.scm
@@ -0,0 +1,2 @@
+;; Calling (pairs s t) will recursively call (pairs (stream-cdr s) (stream-cdr t)).
+;; It will lead to an infinite recursion.