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Caesar Cipher, one of the assignments in Problem Set 2.

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upperConv and LowerConv?

Those aren't functions defined in any C general library. I think you're thinking of toupper() and tolower() in the library ctype.h Always check the man pages! Hope that helps Sean
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2 votes

atoi always returns 0

If this is for example for Caesar cipher and you're running ./caesar 2 then key should indeed be set to an integer of 2 as argv[0] is the program name and argv[1] is the string 2. …
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