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，我在其中使用vector"和以下方法声明二维数组:

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 是数组的维度.

where X and Y are the dimensions of the array.

这非常适合我需要实现的目标.但是我想看看对 3D、XYZ 数组使用相同的方法.我假设我开始于:

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>>>

但是我如何声明维度，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，它构造一个包含 n 个元素的容器，每个元素都是提供的值的副本.

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)));

将创建 X 乘 Y 乘 Z 向量.您可能希望对这种类型使用 typedef.

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

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