Dynamic 2D array

dyn2Darray.cpp

#include <iostream>

using namespace std;
int main() {

    int **Matrix;     //Declare a pointer to pointer (integer in this case).
    int maxRows = 5; //Size in rows of your array.
    int maxCols = 5; //Size in cols of your array (does not have to == rows, could be a staggered array).

    Matrix = new int *[maxRows]; //Point table to an array of size maxRows holding null pointers right now.

    /*
              Line 10 creates this:
               
             Matrix=>[0]=> UNDEFINED
                     [1]=> UNDEFINED
                     [2]=> UNDEFINED
                     [3]=> UNDEFINED
                     [4]=> UNDEFINED

    */

    //Loop row times pointing each array location to a newly allocated
    //array of (int's in this case) of whatever size (size maxCols in this case).

    for (int row = 0; row < maxRows; row++) {
        Matrix[row] = new int[maxCols];
    }

    /*
              Lines 26-28 creates this:
                            0  1  2  3  4
             Matrix=>[0]=> [ ][ ][ ][ ][ ]
                     [1]=> [ ][ ][ ][ ][ ]
                     [2]=> [ ][ ][ ][ ][ ]
                     [3]=> [ ][ ][ ][ ][ ]
                     [4]=> [ ][ ][ ][ ][ ]

              Which is essentially:
                         0  1  2  3  4
                      0 [ ][ ][ ][ ][ ]
                      1 [ ][ ][ ][ ][ ]
                      2 [ ][ ][ ][ ][ ]
                      3 [ ][ ][ ][ ][ ]
                      4 [ ][ ][ ][ ][ ]       
              
              Accessed like: Matrix[2][3] = 10;

    */

    // load array with random values
    for (int i = 0; i < maxRows; i++) {
        for (int j = 0; j < maxRows; j++) {
            Matrix[i][j] = rand() % 100;
        }
    }

    // print array
    for (int i = 0; i < maxRows; i++) {
        for (int j = 0; j < maxRows; j++) {
            cout << Matrix[i][j] << " ";
        }
        cout << endl;
    }
}