This program implements a simple encryption and decryption system using the XOR operation.
It allows the user to encrypt a message by XOR-ing each character of the message with a user-defined key and decrypts it using the same key.
The program features a menu for selecting encryption, decryption, or exit options, ensuring a seamless interaction.
This XOR-based encryption demonstrates the simplicity of symmetric key cryptography where same key is used for both encryption and decryption.
