Talk:Structure and Interpretation of Computer Programs

Discussion of exercises from Structure and Interpretation of Computer Programs assumes the use of the MIT Scheme interpreter.

Exercise 1.1:

10

Value 10

(+ 5 3 4)

Value 12

(- 9 1)

Value 8

(/ 6 2)

Value 3

(+ (* 2 4) (- 4 6))

Value 6

(define a 3)

Value "a --> 3"

(define b (+ a 1))

Value "b --> 4"

(+ a b (* a b))

Value 19

(= a b)

Value #f

(if (and (> b a) (< b (* a b)))

   b
   a)

Value 4

(cond ((= a 4) 6)

     ((= b 4) (+ 6 7 a))
     (else 25))

Value 16

(+ 2 (if (> b a) b a))

Value 6

(* (cond ((> a b) a)

        ((< a b) b)
        (else -1))
  (+ a 1))

Value 16