(Solved): Write a program that will encrypt/decrypt messages. Create a menu that asks the user whether they ...

Write a program that will encrypt/decrypt messages.

1. Create a menu that asks the user whether they want to (in this order):

   1. Change shift value
      • Make sure you set it to 3 by default
      • When testing, I don't recommend using anything higher than 10
   2. Encrypt a message
   3. Decrypt a message
   4. Quit

2. The user should then be able to type in a message up to 500 characters in length that will be encrypted/decrypted

   • You will use what is called a shift cipher to encrypt the messages
   • A shift cipher takes your input, goes through it one letter at a time, and "shifts" that value a certain amount of places to change its value
   • Your program should encrypt messages by subtracting a value from the character, and decrypt by adding that value.

3. Your program should continue to bring up the main menu until the user selects the option to quit.

Requirements:

Use the following ideas:

• functions
• function returns
• function parameters
• strings
• loops
• if statements