int main()
{
	int size;
	int *pointer;
 
	cout<<"Enter size\n";
	cin>>size;
	pointer=new int[size];
 
	for(int i=0;i<size;i++)
	{
		pointer[i]=i;
	}
 
	for(int i=0;i<size;i++)
	{
		cout<<pointer[i]<<endl;
	}
 
	return 0;
}

int main()
{
	int rows, cols;
	int **pointer;
 
	cout<<"Enter rows and columns for your 2-D array\n";
	cin >> rows >> cols;
 
  // allocate a row of pointers. 
	pointer = new int*[rows];
 
  // for each row allocate the columns 
  for(int i = 0; i < rows; i++){
    pointer[i] = new int[cols];
  }
 
  // add values to the 2-D array 
  for(int i=0;i < rows;i++){
    for(int j = 0; j < cols; j++){
		  pointer[i][j]=(i + 1) * (j + 1);
	  }
  }
 
  // print out the values
	for(int i=0;i<rows;i++){
    for(int j = 0; j < cols; j++){
		  cout << pointer[i][j] << '\t';
	  }
    cout << endl;
  }
 
  //free all the columns for each row
  for(int i = 0; i < rows; i++){
    delete pointer[i];
  }
  // free the rows
  delete pointer; 
 
	return 0;
}

int* arr = new int[rows * cols];