Arithmetic/Rational: Difference between revisions
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<lang ruby>require 'rational' #Only needed in Ruby < 1.9 |
<lang ruby>require 'rational' #Only needed in Ruby < 1.9 |
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for candidate in 2 .. 2**19 |
for candidate in 2 .. 2**19 |
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sum = Rational(1, candidate) |
sum = Rational(1, candidate) |
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for factor in 2 ... candidate**0.5 |
for factor in 2 ... candidate**0.5 |
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end |
end |
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end</lang> |
end</lang> |
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{{out}} |
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It might be implemented like this: |
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<pre> |
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Sum of recipr. factors of 6 = 1 exactly perfect! |
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[insert implementation here] |
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Sum of recipr. factors of 28 = 1 exactly perfect! |
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Sum of recipr. factors of 120 = 2 exactly |
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Sum of recipr. factors of 496 = 1 exactly perfect! |
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Sum of recipr. factors of 672 = 2 exactly |
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Sum of recipr. factors of 8128 = 1 exactly perfect! |
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Sum of recipr. factors of 30240 = 3 exactly |
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Sum of recipr. factors of 32760 = 3 exactly |
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Sum of recipr. factors of 523776 = 2 exactly |
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</pre> |
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=={{header|Scheme}}== |
=={{header|Scheme}}== |
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