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- Most expository problems will be hand-evaluation problems where you are asked to evaluate a particular Racket program invocation. You must format your hand evaluation exactly like our examples (except you will need to insert a comment escape character :.
Example 1: Hand evaluation
Code Block Given (define poly (lambda (x y) (poly+ (expt 2 x) y))) (+ (exptpoly 2 x) y)) 3 5) => ((lambda (x y) (poly+ (expt 2 x) y)) 3 5) => (+ (expt 2 3) 5)) => (+ 8 5) => 13
Example 2: Hand evaluation
Code Block Given (define fact (factlambda (n) (if (zero? n) 1 (* n (fact (- n 1))))) ) (fact 4) => (if (zero? 4) 1 (* 4 (fact (- 4 1)))) => (if false 1 (* 4 (fact (- 4 1)))) => (* 4 (fact (- 4 1))) => (* 4 (fact 3)) => (* 4 (if (zero? 3) 1 (* 3 (fact (- 3 1))))) => (* 4 (if false 1 (* 3 (fact (- 3 1))))) => (* 4 (* 3 (fact (- 3 1)))) => (* 4 (* 3 (fact 2))) => (* 4 (* 3 (if (zero? 2) 1 (* 2 (fact (- 2 1)))))) => (* 4 (* 3 (if false 1 (* 2 (fact (- 2 1)))))) => (* 4 (* 3 (* 2 (fact (- 2 1))))) => (* 4 (* 3 (* 2 (fact 1)))) => (* 4 (* 3 (* 2 (if (zero? 1) 1 (* 1 (fact (- 1 1))))))) => (* 4 (* 3 (* 2 (if false 1 (* 1 (fact (- 1 1))))))) => (* 4 (* 3 (* 2 (* 1 (fact (- 1 1)))))) => (* 4 (* 3 (* 2 (* 1 (fact 0))))) => (* 4 (* 3 (* 2 (* 1 (if (zero? 0) 1 (* 0 (fact (- 0 1)))))))) => (* 4 (* 3 (* 2 (* 1 (if true 1 (* 0 (fact (- 0 1)))))))) => (* 4 (* 3 (* 2 (* 1 1)))) => (* 4 (* 3 (* 2 1))) => (* 4 (* 3 2)) => (* 4 6) => 24
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