File Stream Problem: Implement a Caesar cipher that can encrypt and decrypt text and file. A Caesar cipher is a substitution cipher that shifts the letters in the original message x spaces ascending the alphabet where x is the key. Example if the key for the cipher is 3, and the message is “I will be there.” Then the coded message would be “L zloo eh wkhuh” Program requirements: Create a class call CCipher that has two member functions encrypt and decrypt. The program should be able to encrypt/decrypt a message from a file as well as a keyboard input. The default key should be 3. The user should be able to select between encrypting and decrypting and should be allowed to do so multiple times until s/he decides to end the program. The file format to be encrypted should be a “.txt” and the user should be able to provide the name of the file to be encrypted, after which the file should be deleted. The user should have the option to view and/or save an encrypted/decrypted message. If no file name was specified, the encrypted message should be saved as “encrypt.dat”. If no file name was specified, the decrypted message should be saved as “decrypt.txt”. N.B: THIS SHOULD BE A C++ PROGRAM

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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File Stream

Problem:

Implement a Caesar cipher that can encrypt and decrypt text and file. A Caesar cipher is a

substitution cipher that shifts the letters in the original message x spaces ascending the alphabet

where x is the key.

Example if the key for the cipher is 3, and the message is “I will be there.” Then the coded

message would be “L zloo eh wkhuh”

Program requirements:

Create a class call CCipher that has two member functions encrypt and decrypt.
The program should be able to encrypt/decrypt a message from a file as well as a

keyboard input.

The default key should be 3.
The user should be able to select between encrypting and decrypting and should be

allowed to do so multiple times until s/he decides to end the program.

The file format to be encrypted should be a “.txt” and the user should be able to provide

the name of the file to be encrypted, after which the file should be deleted.

The user should have the option to view and/or save an encrypted/decrypted message.
If no file name was specified, the encrypted message should be saved as “encrypt.dat”.
If no file name was specified, the decrypted message should be saved as “decrypt.txt”.

N.B: THIS SHOULD BE A C++ PROGRAM

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