Ask if they want to encrypt a message.
ToLower: Input: a string Output: A string where all alphabetic characters are in lower case for each letter in the string convert that letter to lower case. GetShiftAmount Input: no input from main Output: returns an integer between 0 and 26 to main Assumes no errors on input. Prompt for number Read in number Convert the number to the proper range. Return the number Convert a number to the proper range. Input: an integer Output: an integer between 0 and 25 While the number is less than 0 add 26 to the number. return the number % 26 GetPlainText Input: none Output: A string Prompt the user for the message Read in the next line Return this line Encode Input: a string, the message an int, the shift amount Output: The encrypted message; for each letter in the string encrypt that letter return the encrypted string. Encrypt Letter Input: a character and a shift amount. Output: the encrypted character. If the letter is alphabetic Note if the letter is upper case Convert the letter to lower case Shift the letter by the shift amount. if the original was upper case convert the shifted letter to upper case else shifted letter = original letter return the shifted letter Shift a letter Input: a lower case character a shift amount Output: a shifted letter find the position by subtracting 'a' new position = position + shift amount convert the new position to the range 0-25 return 'a'+new position