SICP Exercises (1)

<title>SICP Exercises (1)</title> SICP exercises (1) Table of Contents

• 1.1.1 Evaluation
• 2.1.2 Prefix form Conversion
• 3.1.3 To find the sum of the larger two numbers
• 4.1.4 Description Behavior
• 5.1.5 Applicative order vs Normal Order

11.1 Evaluation21.2 Prefix form Conversion

(/(+ 5 4 (-2 (-3 (+ 6 (/4 5)))) 3 (-6 2) (-2 7))

My practice is to start from the inside out.

31.3 The sum of the larger two numbers

(define (f x y z)  (Cond ((and (<= x y) (<= x z)) (+ y z       )) ((and (<= y x) (<= y Z)) (+ x Z       )) (Else (+ x y))))   

Note that you must add the = number, otherwise when x=y=3, Z=6 will execute X+y

41.4 Description Behavior

When B is greater than 0 get--that is a-a or otherwise a+b

51.5 applicative order vs Normal Order

Applicative Order: (Test 0 (p)) (test 0 (p)) has been indefinitely looped down

Normal order: (Test 0 (P)) (if (= 0 0) 0 (p)) because 0 equals 0, it does not execute (p)

Author:lexnewgate

created:2016-01-02 Saturday 01:58

Emacs 24.5.1 (ORG mode 8.2.10)

Validate

SICP Exercises (1)