Multidimensional std::array [duplicate]

Question

In C++, how do I create a multidimensional std::array? I've tried this:

std::array<std::array<int, 3>, 3> arr = {{5, 8, 2}, {8, 3, 1}, {5, 3, 9}}; 

But it doesn't work. What am I doing wrong and how do I fix this?

Answer 1

You need extra brackets, until c++14 proposal kicks in.

std::array<std::array<int, 3>, 3> arr = {{{5, 8, 2}, {8, 3, 1}, {5, 3, 9}}};