Questions tagged [cs50-pset2]

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How to add negative key feature to Caesars cipher?

I completed my PSET from Week 2, which involved writing a code for the Caesar's cipher. And I have a query regarding how to reverse map the letter in alphabet. For example if we take a key of -1 i.e, ...
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I am stuck on CS50 vigenere

Hi please see the link for the code I am working with. I think the layout is correct but cannot seem to find the correct algorithm to solve this problem.