Can you handle array sections in C++ in a similar fashion as modern fortran?

Let's say A is a 9x9 array. If I want to copy the contents of row 4 into the 1x9 array V, in fortran (90 or later) this can be done as

    V = A(:,4)

One could also access elements 4 through 8 in V with

    W = V(5:8)

or perhaps have a 2x5 subarray of A:

    S = A(3:4, 5:9)

This is only a matter of accessing stored values so it causes very little overhead.

Isn't there something as straightforward in C++? What should I #include at the beginning of my code to have similar array handling capabilities?

There is a proposal for std::submdspan, building on std::mdspan, hopefully to be included in C++23. If I undestand correctly, this is exactly what you would want:
>the subspan or “slicing” function that returns a view of a subset of an existing mdspan
> ...
> Creating subspans is an integral capability of many, if not all programming languages with multidimensional arrays. These include Fortran, Matlab, Python, and Python’s NumPy extension.

So there is nothing "as straightforward" in standard C++ yet, but it might come soon. However, you could use a third-party library or just write a simpler version of it using iterators.