使用向量的C ++ 3D数组声明 [英] C++ 3D array declaration using vector

问题描述

我有一些C ++代码，其中使用"vector"通过以下方法声明2D数组:

I have some C++ code where I am declaring 2D arrays using "vector" with the following method:

    std::vector<std::vector<double>> Array2D(X, std::vector<double>Y);

其中X和Y是数组的尺寸.

where X and Y are the dimensions of the array.

对于我需要实现的目标，它的工作非常漂亮. 但是我想看看对3D，XYZ数组使用相同的方法. 我假设我从以下开始:

This works beautifully for what I need to achieve. However I would like to look at using the same method for 3D, XYZ arrays. I assume I start with:

    std::vector<std::vector<std::vector<double>>>

但是如何声明尺寸，即Array3D(X，?????)

but how do I declare the dimensions, ie Array3D(X, ?????)

推荐答案

有 fill 向量构造函数，该构造函数构造具有n个元素的容器，每个元素都是所提供值的副本.

There is fill vector constructor, which constructs a container with n elements, and each element is a copy of value provided.

std::vector<std::vector<std::vector<double>>> Array3D(X, std::vector<std::vector<double>>(Y, std::vector<double>(Z)));

将通过Z向量创建Y乘X.您可能想对这种类型使用typedef.

will create X by Y by Z vector. You probably would like to use typedef for this type.

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