Pset2 Vigenere some flaws in the code

Question

I somehow managed to come up with this code to vigenere but it gives me 9/11 with check50. It encrypts it badly when using the keyword BaZ and BAZ. Why is that please? And also I think I was supposed to use a function (according to the tutorial) that would shift the value but I came up only with this. How would the code look like with the function? Thank you

[removed solution code]

Answer 1

Your issue is a misplaced ) when you calculate the key.

int letterKey = tolower(k[j % kLen] - 'a');

You want to lowercase the key and then subtract 'a'. Move your closing brace.