Problem 1201. Simple Decoder Ring

Created by Peter Wittenberg

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{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The stereotypical</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:i/></w:rPr><w:t>decoder ring</w:t></w:r><w:r><w:t> is remembered as a cereal box prize from the 1950s. Kids learned about cryptography by starting with the simple transposition cipher. There were many different rings made. One of the more common had two rings on a common center, each with the letters of the alphabet in order. You would rotate the inner ring relative to the outer to produce a shift of letters, so the cipher was to produce a positive or negative shift of the alphabet, giving a letter by letter code key.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Whether or not it really was in cereal boxes, your job is to produce a MATLAB function that codes a string using the letter shift required. You must keep the case of the output the same as the input.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ simpleDecoderRing('I am ready to try it - with punctuation and CAPS!',-3)]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>is</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ 'F xj obxav ql qov fq - tfqe mrkzqrxqflk xka ZXMP!']]></w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

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Last Solution submitted on Jul 24, 2020

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James on 14 Jan 2013

Be sure to drink your Ovaltine?

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Solution 190506

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Khaled Hamed on 13 Jan 2013

It was very tempting....

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string manipulation

Problem 1201. Simple Decoder Ring

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Problem 1201. Simple Decoder Ring

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