Write a program that can encrypt and decrypt using the general Caesar cipher, also known as an additive cipher. NOTE: 1 input is continuous text of maximum 80 characters without blank space 2.there...

Write a program that can encrypt and decrypt using the general Caesar cipher, also known as an additive cipher.

NOTE: 1 input is continuous text of maximum 80 characters without blank space

2.there must a function to code each plain text character into its corresponding index

3. a function to perform encryption should ask for shift size

4. a function to decrypt the generated cypher text