dynamic multidimensional arrays in ctor

[styx736]

hello,
I need to create a dynamic 2D-array in a class. Here is my idea:

class GameOfLife {
private:
   int** Matrix;
public:
   GameOfLife(int rows, int cols);
   ~GameOfLife();
};
GameOfLife::GameOfLife(int r, int c) {
   Matrix = new int[r];
   for (int i=0; i<r; i++) {
      Matrix[i] = new int[c];
   }
}
GameOfLife::~GameOfLife(void) {
   delete[] Matrix;
}

I get this message on line 9: "cannot convert 'int*' to 'int**' in assignment"
What does it means?

[anup30]

// 2D dynamic array
#include <iostream>
using namespace std;

void setVal(int **ar, const int r, const int c) {
	for (int i = 0; i < r; i++)	{
		for (int j = 0; j < c; j++)
			ar[i][j] = i+j;
	}
return;
}


int main() {
	int row=3, column=5;
	//cout << "enter row and column number:\n";
	//cin >> row >> column;

	int **arr = new int*[row];
	for (int i = 0; i < row; ++i) {
		arr[i] = new int[column];
	}

	setVal(arr, row, column);

	for (int i = 0; i < row; i++) {
		for (int j = 0; j < column; j++) {
			cout << "arr[" << i << "][" << j << "]= " << arr[i][j] << "  ";
		}
		cout << "\n";
	}

	for(int i=0; i<row; i++)
		delete[] arr[i];

	delete[] arr;

return 0;
}