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Held: Wednesday, 28 October 2009
We visit a slightly different kind of recursion, numeric recursion. In
this technique, we once again have procedures call themselves. However,
the parameter that we
simplify at every step is a number, rather
than a list.
(define recursive-proc (lambda (params) (if (base-case-test) (base-case params) (combine (partof params) (recursive-proc (simplify params))))))
(define recursive-proc (lambda (params) (cond ((base-case-test) (base-case params)) ((special-case-test) (combine (partof params) (recursive-proc (simplify params)))) (else (recursive-proc (simplify params))))))
take the cdrand the
part-ofwas almost always
take the car.
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