Please write this code in C++, also if you could please
bold the names of the input files and provide comments for each
choice.
For this part, the program gives the user 4 choices for
encrypting (or decrypting) the first character of a file.
Non-lowercase characters are simply echoed. The encryption is only
performed on lowercase characters.
If c is char variable, then islower(c) will return true if c
contains an lowercase character, false otherwise
To read a single character...