张量（Tensor）：表示某种相同数据类型的多维数组。

0阶tensor = 标量（Scalar）2

1阶tensor = 向量（Vector）[1, 2, 3, 4] -> [1] = 2

2阶tensor = 矩阵（Matrix）[[1, 2], [3, 4]] -> [0][1] = 2

3阶tensor = 立方（Cube）[[[1], [2]], [[3], [4]]] -> [0][1][0] = 2

n阶tensor = …

#include <iostream>

using namespace std;

const int N = 5;
int a[N][N][N];

int main()
{
    int s = 0;
    for (int i = 0; i < N; ++i)
    {
        for (int j = 0; j < N; ++j)
        {
            for (int k = 0; k < N; ++k)
                a[i][j][k] = ++s;
        }
        s = 0;
    }
    for (int i = 0; i < N; ++i)
    {
        for (int j = 0; j < N; ++j)
        {
            for (int k = 0; k < N; ++k)
                cout << a[i][j][k] << " ";
            puts("");
        }
        puts("");
    }
    return 0;
}