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  1.  (defun integer-sqrt (num)
  2.    (if (zerop num)
  3.      0
  4.      (labels ((next-approx (curr)
  5.                            (truncate (/ (+ curr (truncate (/ num curr))) 2)))
  6.               (int-sqrt (n n1)
  7.                         (if (>= n1 n)
  8.                           n
  9.                           (int-sqrt n1 (next-approx n1)))))
  10.        (let ((first-aprox (1+ (truncate (/ num 2)))))
  11.          (int-sqrt first-aprox (next-approx first-aprox))))))
  12.  
  13. (integer-sqrt 26)
Success #stdin #stdout 0.03s 10584KB
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stdout 
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https://ideone.com/zROez
language:
Common Lisp (clisp 2.49.92)
created:
14 years ago
visibility:
public

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