please help me>>>>:(

I have a problem with Question should be write in C++

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encrypt the message

intr Univer is best

using a double transposition cipher with 4 rows and 4 columns, using the row permutation

(1, 2, 3, 4) → (2, 4, 1, 3)

and the column permutation

(1, 2, 3, 4) → (3, 1, 2, 4)

Do you actually know how to do "double transposition cipher" on paper?

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Yes

Then (1) write down the steps you would do if you were doing it yourself (2) have the computer do each of those steps (3) done.