From: Ramakrishnan Muthukrishnan <vu3rdd@gmail.com>
Date: Fri, 26 Nov 2010 12:38:07 +0000 (+0530)
Subject: solution to 2.61 and 2.62
X-Git-Url: https://git.rkrishnan.org/listings/frontends?a=commitdiff_plain;h=95b2ccf229800dc12a8cb9830fc8986509211ff6;p=sicp.git

solution to 2.61 and 2.62
---

diff --git a/src/sicp/ex2_61.rkt b/src/sicp/ex2_61.rkt
new file mode 100644
index 0000000..a443206
--- /dev/null
+++ b/src/sicp/ex2_61.rkt
@@ -0,0 +1,7 @@
+#lang racket
+
+(define (adjoin-set x set)
+  (cond ((null? set) (cons x set))
+        ((= x (car set)) set)
+        ((< x (car set)) (cons x set))
+        ((> x (car set)) (cons (car set) (adjoin-set x (cdr set))))))
\ No newline at end of file
diff --git a/src/sicp/ex2_62.rkt b/src/sicp/ex2_62.rkt
new file mode 100644
index 0000000..47fb870
--- /dev/null
+++ b/src/sicp/ex2_62.rkt
@@ -0,0 +1,8 @@
+#lang racket
+
+(define (union-set set1 set2)
+  (cond ((null? set1) set2)
+        ((null? set2) set1)
+        ((= (car set1) (car set2)) (cons (car set1) (union-set (cdr set1) (cdr set2))))
+        ((< (car set1) (car set2)) (cons (car set1) (union-set (cdr set1) set2)))
+        ((> (car set1) (car set2)) (cons (car set2) (union-set set1 (cdr set2))))))
\ No newline at end of file