2-D Dynamic Matrix in C++

DynamicMatrix.cpp

/**
 * @file DynamicMatrix.cpp
 * @author Jugal Shah (shahjugalr@gmail.com)
 * @brief How to allocate a 2-D(True) array dynamically.
 * @version 0.1
 * @date 17/04/2022
 * 
 * @copyright Copyright (c) 2022
 * 
 */

#include <bits/stdc++.h>

int main(){
    
    // Pointer to a Pointer to a integer.
    int **matrix;

    // No of rows and columns
    int rowCount, columnCount;

    // Take in row and column count.
    std::cin >> rowCount >> columnCount;
    std::cout << std::endl;

    // Make an array of size row count containing pointers to integer.
    matrix = new int* [rowCount];

    for (int i = 0; i < rowCount; i++)
    {   
        //  Allocate a new array of size column count for each row.
        matrix[i] = new int [columnCount];
    }

    // Store some value.
    for (int i = 0; i < rowCount; i++)
    {
        for (int j = 0; j < columnCount; j++)
        {
            matrix[i][j] = i + j;
        }
        
    }

    // Print Matrix just doing it so that can show that matrix created successfully.
    for (int i = 0; i < rowCount; i++)
    {
        for (int j = 0; j < columnCount; j++)
        {
            std::cout << matrix[i][j] << " ";
        }
        std::cout << std::endl;
        
    }

    for (int i = 0; i < rowCount; i++)
    {   
        //  de-Allocate an allocated array of size column count for each row.
        delete [] matrix[i];
    }

    // de-Allocates array containing pointers to those arrays which we de-allocated proviously.
    delete [] matrix;

}