Transposed matrix P27498

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Solution status: C++ Java Python . (red languages have some issue).

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Statement

Write a procedure that transposes a square matrix @m@.

Interface

C++	`typedef vector< vector<int> > Matrix;`
	`void transpose(Matrix& m);`
Java	`public static void transpose(int[][] m);`
Python	`transpose(m) # returns None`
MyPy	`transpose(m: list[list[int]]) -> None`

Precondition

@m@ is a square matrix $n\times n$ with $n\ge0$ .

Information

Author: Jordi Petit
Language: English
Translator: Carlos Molina
Original language: Catalan
Other languages: Catalan
Official solutions: C++ Java Python
User solutions: C++ Java Python