Convert Pointer to Pointer to a multi-dimensional array

Here is an example of how to do this. The key is using a typedef to setup your pointer to the array of pointers so that you don't get too confused.

typedef int (*pint3)[A][B];

In this line, we set up a type that points to a two-dimensional array of pointers to int. The 2D array has dimensions equal to two of the dimensions that you originally were considering.

As mentioned in the comments, this method violates aliasing. This type of pointer reassignment is error-prone and should probably be avoided.

#include <iostream>

int main() {

    int A = 2;
    int B = 2;
    int C = 3;

    int array[]{1, 1, 1, 1, 2, 2, 2,2, 3,3,3,3};



    const int *const p = array;

    typedef int (*pint3)[A][B];

    auto threeDArray = (pint3) p;

    std::cout << "Printing 3D array:  " << std::endl;
    for(int i = 0; i < C; i++ ) {
        for(int j = 0; j < B; j++) {
            for (int k = 0; k < A; k++) {
                std::cout << threeDArray[i][j][k];
            }
            std::cout << std::endl;
        }
        std::cout << std::endl;

    }
}

Output:

Printing array:  
11
11

22
22

33
33


Process finished with exit code 0