Problem 78. Implement a ROT13 cipher
Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if necessary). So A ? N, B ? O, and so on until Y ? L and Z ? M. Case of the output should match the case of the input, so a ? n. Non-alphabetic characters are left in place and untouched.
If
s1 = 'I love MATLAB'
then
s2 = 'V ybir ZNGYNO'
See the Wikipedia article for more info.
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3 Comments
Why does the "t" not change in the second word of the second test? The correct answer has an unchanged "t"?
I'm wondering the same thing. The letters in the second word are not rotated!
OK, I see that the '& l t ;' is the < symbol, therefore, the group of four chars should stay together and not be changed, but that requires an interpretation of the input string as opposed to using the input string as is.
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