Ethiopian multiplication: Difference between revisions
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(CL Ethiopian Multiply) |
(typo fix in CL multiple/multiply) |
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=={{header|Common Lisp}}== |
=={{header|Common Lisp}}== |
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Common Lisp already has <code>evenp</code>, but all three of <code>halve</code>, <code>double</code>, and <code>even-p</code> are locally defined within <code>ethiopian- |
Common Lisp already has <code>evenp</code>, but all three of <code>halve</code>, <code>double</code>, and <code>even-p</code> are locally defined within <code>ethiopian-multiply</code>. (Note that the termination condition is <code>(zerop l)</code> because we terminate 'after' the iteration wherein the left column contains 1, and <code>(halve 1)</code> is 0.) |
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<lang lisp>(defun ethiopian-multiply (l r) |
<lang lisp>(defun ethiopian-multiply (l r) |
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