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Vigenere Cipher, one of the assignments in Problem Set 2. It's like Caesar Cipher, but with a twist.

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Sometimes the vigenere cipher went wrong but i can't figure out why~please help!

it compile like this: ~/workspace/pset2/ $ check50 2015.fall.pset2.vigenere vigenere.c :) vigenere.c exists :) vigenere.c compiles :) encrypts "a" as "a" using "a" as keyword :( encrypts "world, say …
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