dynamic_matrix.cpp

#include <iostream>

using namespace std;

int main()
{
    int **board;

    int rows;
    int columns;

    cout << "enter a number of rows: ";
    cin >> rows;
    cout << "enter a number of columns: ";
    cin >> columns;

    board = new int* [rows];

    for(int i = 0; i<rows; i++)
        board[i] = new int[columns];

    for(int i = 0; i< rows; i++)
    {
        for(int j = 0; j < columns; j++)
        {
            cin >> board[i][j];
        }
    }

    for(int i = 0; i< rows; i++)
    {
        for(int j = 0; j < columns; j++)
        {
            cout << board[i][j] <<" ";
        }
        cout << endl;
    }

    return 0;
}