DES Programming Assignment $-$ C$++($no built$-$in functions allowed, everything must be hard$-$coded$).$

Let the user choose encryption or decryption.

For encryption, let user input the key in Hexadecimal number, the plain text in Hexadecimal number, output the ciphertext $($in hexadecimal numbers$).$

For decryption, let user input the key in Hexadecimal number, the ciphertext $($in hexadecimal numbers$),$ output the decrypted message $($Hexadecimal number$).$

Submit your program to Moodle with the notes of how to compile and run your program.