sicp.org: Add Ex. 2.24.

1 files changed, 43 insertions, 0 deletions

diff --git a/sicp.org b/sicp.org
index 54d4343..a2ee7fe 100644
--- a/sicp.org
+++ b/sicp.org
@@ -471,3 +471,46 @@ creates a list with the squared numbers in a messy nested list like:
 (square-list '(1 2 3 4 5))
 ;; $3 = (((((() . 1) . 4) . 9) . 16) . 25)
 #+END_SRC
+*** 24
+#+BEGIN_EXAMPLE
+(1 (2 (3 4)))
+
+
+   +----+----+      +----+----+      +----+----+      +----+----+
+   | o  | o--|----->| o  | o--|----->| o  | o--|----->| o  | /  |
+   +----+----+      +----+----+      +----+----+      +----+----+
+     |                |                |                |
+     |                |                |                |
+     v                v                v                v
+   +----+           +----+           +----+           +----+
+   | 1  |           | 2  |           | 3  |           | 4  |
+   +----+           +----+           +----+           +----+
+
+
+                              (1 (2 (3 4)))
+                              o
+                             / \
+                            /   \
+                           /     \
+                          /       \
+                         /         \
+                        1           \
+                                     \  (2 (3 4))
+                                      o
+                                     / \
+                                    /   \
+                                   /     \
+                                  /       \
+                                 /         \
+                                /           \
+                               2             \
+                                              \ (3 4)
+                                               o
+                                              / \
+                                             /   \
+                                            /     \
+                                           /       \
+                                          /         \
+                                         /           \
+                                        3             4
+#+END_EXAMPLE