多维 std::array

Multidimensional std::array(多维 std::array)

问题描述

在 C++ 中，如何创建多维 std::array?我试过这个:

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}};

但它不起作用.我做错了什么，我该如何解决?

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

推荐答案

你需要额外的括号，直到 c++14 提案 生效.

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}}};

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