c++ - 未定义模板的隐式实例化 'std::__1::array'

Question

我复制并粘贴了这个确切的代码，找到了 here进入我的 IDE，出现错误，我不明白为什么会这样，想了解原因。

std::array<int, 3> a2 = {1, 2, 3}; // except after =

Answer 1

一定要记住#include <array>

But if you don't include any standard headers, you should get asimpler error about std being undefined.