10 lines
315 B
Scheme
10 lines
315 B
Scheme
(define agm
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(case-lambda
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((a0 g0) ; call again with default value for tolerance
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(agm a0 g0 1e-8))
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((a0 g0 tolerance) ; called with three arguments
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(do ((a a0 (* (+ a g) 1/2))
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(g g0 (sqrt (* a g))))
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((< (abs (- a g)) tolerance) a)))))
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(display (agm 1 (/ 1 (sqrt 2)))) (newline)
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