Gotcha - the crypto.h version is the correct one (for the reasons I gave - the output parameter comes last).

So that's how you need to code your implementation - does that help?

Cheers

Arran

"Taylah Karran" [email protected] wrote:

Hi Arran,

Apologies, I copied the wrong function in my initial question, In the pdf the caesar decrypt declaration has plain_text before cipher_text:

void caesar_decrypt(char range_low, char range_high, int key, const char * plain_text, char * cipher_text);

But crypto.h has them the other way around:

void caesar_decrypt(char range_low, char range_high, int key, const char * cipher_text, char * plain_text);

So it throws an error when I go to compile.