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diff --git a/engines/pegasus/neighborhood/mars/reactor.h b/engines/pegasus/neighborhood/mars/reactor.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef PEGASUS_NEIGHBORHOOD_MARS_REACTOR_H
+#define PEGASUS_NEIGHBORHOOD_MARS_REACTOR_H
+
+#include "pegasus/elements.h"
+#include "pegasus/surface.h"
+#include "pegasus/util.h"
+
+namespace Pegasus {
+
+class ReactorGuess : public DisplayElement {
+public:
+	ReactorGuess(const DisplayElementID);
+	virtual ~ReactorGuess() {}
+
+	void initReactorGuess();
+	void disposeReactorGuess();
+
+	void setGuess(int32, int32, int32);
+
+	void draw(const Common::Rect &);
+
+protected:
+	int32 _currentGuess[3];
+
+	Surface _colors;
+};
+
+class ReactorChoiceHighlight : public DisplayElement {
+public:
+	ReactorChoiceHighlight(const DisplayElementID);
+	virtual ~ReactorChoiceHighlight() {}
+
+	void initReactorChoiceHighlight();
+	void disposeReactorChoiceHighlight();
+
+	void resetHighlight() {
+		_choices.clearAllFlags();
+		triggerRedraw();
+	}
+
+	bool choiceHighlighted(uint32 whichChoice) { return _choices.getFlag(whichChoice); }
+
+	void draw(const Common::Rect &);
+
+	void highlightChoice(uint32 whichChoice) {
+		_choices.setFlag(whichChoice);
+		triggerRedraw();
+	}
+
+protected:
+	Surface _colors;
+	FlagsArray<byte, 5> _choices;
+};
+
+class ReactorHistory : public DisplayElement {
+public:
+	ReactorHistory(const DisplayElementID);
+	virtual ~ReactorHistory() {}
+
+	void initReactorHistory();
+	void disposeReactorHistory();
+
+	void draw(const Common::Rect &);
+
+	void addGuess(int32, int32, int32);
+	int32 getNumGuesses() { return _numGuesses; }
+	void clearHistory();
+	void setAnswer(int32, int32, int32);
+	void showAnswer();
+	bool isSolved();
+	int32 getCurrentNumCorrect();
+
+protected:
+	Surface _colors, _digits, _answerColors;
+	int32 _answer[3];
+	int32 _history[5][3];
+	int32 _numGuesses;
+	bool _showAnswer;
+};
+
+} // End of namespace Pegasus
+
+#endif