Exercise 1.5: Ben Bitdiddle has invented a test
to determine whether the interpreter he is faced with is using
applicative-order evaluation or normal-order evaluation.  He defines the
following two procedures:


(define (p) (p))

(define (test x y) 
  (if (= x 0) 
      0 
      y))

Then he evaluates the expression


(test 0 (p))

What behavior will Ben observe with an interpreter that uses applicative-order
evaluation?  What behavior will he observe with an interpreter that uses
normal-order evaluation?  Explain your answer.  (Assume that the evaluation
rule for the special form if is the same whether the interpreter is
using normal or applicative order: The predicate expression is evaluated first,
and the result determines whether to evaluate the consequent or the alternative
expression.)