用c++在堆上创建三维结构数组。

#include <iostream>

struct MyStruct {
    int x;
    int y;
    int z;
};

int main() {
    int sizeX = 3;  // 第一维大小
    int sizeY = 4;  // 第二维大小
    int sizeZ = 5;  // 第三维大小

    // 动态分配内存空间
    MyStruct*** arr = new MyStruct**[sizeX];
    for (int i = 0; i < sizeX; ++i) {
        arr[i] = new MyStruct*[sizeY];
        for (int j = 0; j < sizeY; ++j) {
            arr[i][j] = new MyStruct[sizeZ];
        }
    }

    // 初始化数组元素
    for (int i = 0; i < sizeX; ++i) {
        for (int j = 0; j < sizeY; ++j) {
            for (int k = 0; k < sizeZ; ++k) {
                arr[i][j][k].x = i;
                arr[i][j][k].y = j;
                arr[i][j][k].z = k;
            }
        }
    }

    // 访问数组元素
    for (int i = 0; i < sizeX; ++i) {
        for (int j = 0; j < sizeY; ++j) {
            for (int k = 0; k < sizeZ; ++k) {
                std::cout << "arr[" << i << "][" << j << "][" << k << "]: ";
                std::cout << arr[i][j][k].x << ", ";
                std::cout << arr[i][j][k].y << ", ";
                std::cout << arr[i][j][k].z << std::endl;
            }
        }
    }

    // 释放内存空间
    for (int i = 0; i < sizeX; ++i) {
        for (int j = 0; j < sizeY; ++j) {
            delete[] arr[i][j];
        }
        delete[] arr[i];
    }
    delete[] arr;

    return 0;
}