bool Window::IsInBounds(int row, int col) const
// post: returns true if the point (row, col) is in this window
//		 otherwise, returns false
{
	if (row < 0 || row >= myNumRows ||
	    col < 0 || col >= myNumCols)
	    	return false;
	return true;
}

void Window::ColorSqaure(int ULrow, int ULcol, int N, int val)
// post: all points in this window that are also in the N-by-N square
//		 with upper left corner (ULro, ULcol) have been set to val;
//		 points in the square that are not in this window are ignored
{
	for (int row = 0; row < N; row++)
	{
		int x = row + ULrow;
		for (int col = 0; col < N; col++)
		{
			int y = col + ULcol;
			if (IsInBounds(x, y))
				myMat[x][y] = val;
		}
	}
}
void Enlarge(Window & W, const Rectangle & rect, int factor)
// pre: factor > 0
{
	int lastRow = (rect.numRows - 1) * factor + rect.ULrow;
	for (int r = rect.ULrow + rect.numRows - 1; r >= rect.ULrow; r--)
	{
		int lastCol = (rect.numCols - 1) * factor + rect.ULcol;
		for (int c = rect.ULcol + rect.numCols - 1; c >= rect.ULcol; c--)
		{
			W.ColorSqaure(lastRow, lastCol, factor, W.ValAt(r,c));
			lastCol -= factor;
		}
		lastRow -= factor;
	}
}