Учебный проект на языке Си. Программа для шифрования текста с помощью шрифта
Цезаря.

Usage: cccipher [OPTIONS]

Options:
  -h, --help                 Show this help message and exit
  -em <number> <message>     Encrypts the message with a shift equal to the specified number
  -dm <number> <message>     Decrypts the message with a shift equal to the specified number
  -ef <number> <message>     Encrypts the text from the file with a shift equal to the specified number
  -df <number> <message>     Decrypts the text from the file with a shift equal to the specified number