Question: Write a Columnar transposition encryption and decryption in C++. It has to be read from user and user can chose either from a file or

Write a Columnar transposition encryption and decryption in C++. It has to be read from user and user can chose either from a file or mannually type in. No string and no class in this program (Just very basic C+language such as 'cout' instread of 'printf').

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