Ethiopian multiplication: Difference between revisions
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Y (double Y) ) ) |
Y (double Y) ) ) |
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R ) )</lang> |
R ) )</lang> |
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=={{header|Pike}}== |
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<lang Pike>int ethopian_multiply(int l, int r) |
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{ |
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int halve(int n) { return n/2; }; |
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int double(int n) { return n*2; }; |
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int(0..1) evenp(int n) { return !(n%2); }; |
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int product = 0; |
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do |
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{ |
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write("%5d %5d\n", l, r); |
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if (!evenp(l)) |
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product += r; |
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l = halve(l); |
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r = double(r); |
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} |
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while(l); |
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return product; |
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}</lang> |
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=={{header|PL/I}}== |
=={{header|PL/I}}== |
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