Simple Encryption

[bubbles]

Alrighty!!

So I have an assignment ( it is supposed to be a simple one ....yeah right)
the point of the assignment is to implement a one time pad. We finished covering pointers and I/o files so I know that I should be doing something with this. The problem I encounter when trying to start the assignment is this:

The following show the encryption results.

 Plain Text : Whats up?

 Key : Man it is cold outside

 Encrypted Text: LRSY  IJ // it also contains some undefined symbols

So why are there three lines? I thought that if I was to encrypt something that I would have the original plain text and then the symbols . I dont understand why i have the middle line?

[oonej]

the key is the encryption key which determines your algorithm for your encryption...

i believe

[Peter87]

The middle line is your key. You use the key to convert the plain text to the encrypted text, and also to convert the encrypted text to plain text.

[bubbles]

ignore this comment :p

[bubbles]

So the middle line is my key, what is the point of the plain text?

[BlackSheep]

You encrypt the plain text using the key which gives you the encrypted text.
Your encyption function looks something like:

encrypted encrypt(key,plain)
{
encrypted = key+plain
return encrypted
}

[bubbles]

Thanks blacksheep!

We were given :

offset = (KeyLetter - 'A') + 1
encryptedLetter = 'A' + (original distance from 'A' + offset) % 26
encryptedLetter = 'A' + (plainTextLetter - 'A' + offset) % 26

is this supposed to be the equation that the encrypted words turn into?