Part 2. Problem 4. Read Section 4.6 from the textbook. Give a short description of how encryption/decryption of text messages can be done using a shift cipher. Problem 5. a) Write a C++ function that inputs a text message and a positive integer k less than 26 and outputs an encrypted version of the message using the shift cipher with key k. b) Write a C++ function that inputs a positive integer k less than 26 and a text message encrypted using the shift cipher with key k and outputs a decrypted version of the message. c) Write a C++ program to test your functions from parts a) and b). Note: While working on this problem, assume that each text message consists of capital letters and spaces only. For Problem 5, submit your C++ program and test results. Make sure to test your program several times.
Part 2. Problem 4. Read Section 4.6 from the textbook. Give a short description of how encryption/decryption of text messages can be done using a shift cipher. Problem 5. a) Write a C++ function that inputs a text message and a positive integer k less than 26 and outputs an encrypted version of the message using the shift cipher with key k. b) Write a C++ function that inputs a positive integer k less than 26 and a text message encrypted using the shift cipher with key k and outputs a decrypted version of the message. c) Write a C++ program to test your functions from parts a) and b). Note: While working on this problem, assume that each text message consists of capital letters and spaces only. For Problem 5, submit your C++ program and test results. Make sure to test your program several times.
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