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// C++ program to dynamically allocate
// the memory for 3D array in C++
// using new operator
#include <iostream>
using namespace std;
 
// Driver Code
int main()
{
    // Dimensions of the 3D array
    int x = 2, y = 3, z = 4;
    int count = 0;
 
    // Allocate memory blocks
    // of size x*y*z
    int* a = new int[x * y * z];
 
    // Traverse the 3D array
    for (int i = 0; i < x; i++) {
        for (int j = 0; j < y; j++) {
            for (int k = 0; k < z; k++) {
 
                // Assign values to the
                // memory blocks created
                *(a + i * y * z + j * z + k) = ++count;
            }
        }
    }
 
    // Traverse the 3D array again
    for (int i = 0; i < x; i++) {
        for (int j = 0; j < y; j++) {
            for (int k = 0; k < z; k++) {
 
                // Print values of the
                // memory blocks created
                cout << *(a + i * y * z + j * z + k) << " ";
            }
            cout << endl;
        }
        cout << endl;
    }
 
    // Deallocate memory
    delete[] a;
 
    return 0;
}  

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// C++程序用new运算符为C++中的3D数组动态分配内存
#include <iostream>
using namespace std;

// 驱动程序
int main()
{
     
    // 3D数组的维度
    int x = 2, y = 3, z = 4;
    int count = 0;

    // 分配大小为x的内存块，即2D数组的数量
    int*** a = new int**[x];

    for (int i = 0; i < x; i++) {

        // 为每个2D数组的行分配内存块
        a[i] = new int*[y];

        for (int j = 0; j < y; j++) {

            // 为每个2D数组的列分配内存块
            a[i][j] = new int[z];
        }
    }

    for (int i = 0; i < x; i++) {
        for (int j = 0; j < y; j++) {
            for (int k = 0; k < z; k++) {

                // 将值分配给创建的内存块
                a[i][j][k] = ++count;
            }
        }
    }

    for (int i = 0; i < x; i++) {
        for (int j = 0; j < y; j++) {
            for (int k = 0; k < z; k++) {

                // 打印创建的内存块的值
                cout << a[i][j][k] << " ";
            }
            cout << endl;
        }
        cout << endl;
    }

    // 释放内存
    for (int i = 0; i < x; i++) {
        for (int j = 0; j < y; j++) {
            delete[] a[i][j];
        }
        delete[] a[i];
    }
    delete[] a;

    return 0;
}  

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