Creating dynamic 2D array in c++

It is not hard to dynamically create and initialize a 2d array in c++. we need to create an array that holds pointers. Let's see in the below code snippet how I made a 2d array that holds integers.

This example code creates a 2d array that holds values of a squared matrix.

#include <iostream>

using namespace std;

int main()
{
	int dimen;

	cout << "Enters the matrix dimen : " << endl;

	// squared matrix 
	cin >> dimen;
	int** arr = new int*[dimen * dimen];

	cout << "enter row values line by line" << endl;
	for (int i = 0; i < dimen; i++) {
		arr[i] = new int[dimen];
		for (int j = 0; j < dimen; j++) {
			cin >> arr[i][j];
		}
	}

	// output
	cout << "Matrix ->" << endl;
	for (int i = 0; i < dimen; i++) {
		cout << "| ";
		for (int j = 0; j < dimen; j++) {
			cout << arr[i][j] << " ";
		}
		cout << "|" << endl;
	}

	// release 
	for (int i = 0; i < dimen; i++) {
		delete[] arr[i];
	}

	delete[] arr;
}