Problem 1201. Simple Decoder Ring

Created by Peter Wittenberg

Solve Later

{"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>"}]}

Solve

Solution Stats

178 Solutions
81 Solvers

Last Solution submitted on Mar 21, 2023

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

James on 14 Jan 2013

Be sure to drink your Ovaltine?

ChrisR on 15 Jan 2022

Why do they call it Ovaltine? The jar is round. The mug is round. They should call it Roundtine.

Solution Comments

Solution 190506

1 Comment

1 Comment

Khaled Hamed on 13 Jan 2013

It was very tempting....

Problem Recent Solvers81

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 1201. Simple Decoder Ring

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers81

Suggested Problems

More from this Author2

Problem Tags

Community Treasure Hunt

Problem 1201. Simple Decoder Ring

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers81

Suggested Problems

More from this Author2

Problem Tags

Community Treasure Hunt

Players