NEED HELP ASAP C++ Caesar Cipher

I'm in need of a C++ code program which encrypts and decrypts using the CAESAR CIPHER please help

Please leave comments within the code for reference. I want to learn but I need a good grade. Look at the images provided.

/mimirplatform.production/ files/33ecdf/1-fce8-4812-a994-b2b17b32ede3/Readme.pdf HomelCheggcom iakai@UW : My w0 ileyPLUS Home / e 00-intro mswgBookshelf Online Lib Getting Started . Get into your Docker development environment and change into the data directory . Download the lab framework with git clone https://gi thub. com/cac211/laba . Type cd lab3 followed by 1s . You will see this Readme.nd along with a C++ source file (caesar.cpp) and a compile script compile a longer one called shakespeare.txt executable program called caesar. However, it won't do anything yet! . You will also see two input files: one very short one called short.txt and . You can now compile the lab by typing ./compile and it will produce an Requirements . I have provided an empty main() function. . I have also provided function declarations char encrypt (char, int) and char decrypt (char, int). . You must write the implementation of encryptO and decrypt(), as well as handling command-line arguments and file I/O. . Your program must take exactly four command-line arguments. . The first is a string, either "-e"or" indicating whether to call encrypt or decrypt O respectively . The second is a mumber representing the key to be used for the encryption or decryption, so you'll need to use atoi) to turn it into an integer . The third is a filename to read from. . The fourth is a filename to write to. . Your program must read from the first file, determine whether to encrypt or decrypt the input, and write it out to the second file DOLL