Write a Columnar transposition encryption and decryption in C++. It has to be get msg and key from user and user can chose either to encrypt or decrypt from a FILE or mannually type in. No STRING, VECTOR, MAP and CLASS in this program (Just very basic C+language such as 'cout' instread of 'printf'). Please make sure it runs in Visual Studio with Comments if possible. Please Please Please make sure it's compile(including file input, corrent encryption and decryption. Thanks for your time