I've been given a task in which I have to code a C++ program where an encryption key string with a length of 26 small alphabet is asked, then the user must input a word to encrypt and then it shows the encrypted word. If the encryption key has not all the characters, then the program shows the ones that are missing.
I've trying to study this thing a lot in google and c++ books but I'm a beginner, just learned how to use loops and so. i dont know at all where to start. Should I use just strings, or arrays or what?
If theres some pointers you could give me, i would be very happy ! :)