check50 not approving my code but it looks like it's working

Question

Check50 is telling me that none of the expected ciphers are working, however running each of them appears to give the exact same output it expects. I cannot see where the failure is coming from. Check50 output:

:) caesar.c exists.
:) caesar.c compiles.
:( encrypts "a" as "b" using 1 as key
    expected "ciphertext: b\n", not "b\n"
:( encrypts "barfoo" as "yxocll" using 23 as key
    expected "ciphertext: yxo...", not "yxocll\n"
:( encrypts "BARFOO" as "EDUIRR" using 3 as key
    expected "ciphertext: EDU...", not "EDUIRR\n"
:( encrypts "BaRFoo" as "FeVJss" using 4 as key
    expected "ciphertext: FeV...", not "FeVJss\n"
:( encrypts "barfoo" as "onesbb" using 65 as key
    expected "ciphertext: one...", not "onesbb\n"
:( encrypts "world, say hello!" as "iadxp, emk tqxxa!" using 12 as key
    expected "ciphertext: iad...", not "iadxp, emk tqxx..."
:) handles lack of argv[1]

Pastebin of my code: https://pastebin.com/UHV6rFrB

I know my code is a little messy, I am very new to this and trying to get better

Answer 1

The good news is: it looks like your ciphering algorithm is working. Yay. The bad news is you missed a important detail in the spec.

Notice the difference between what cs50 is expecting: "ciphertext: b\n" and what program is outputting: "b\n". It is the same difference on all the tests. CS50 is looking for ciphertext: before the cipher output.

From the instructions:

after validating the key, we prompt the user for a string (using "plaintext: " for the prompt) and then shift all of its characters by 1, printing out "ciphertext: " followed by the result and a newline.