[gbrainy] Percentage puzzle

[Jordi Mas <jmas src gnome org>]

commit d790f0282a615c4a9de3cd3f00a8d93cb0fe3027
Author: Jordi Mas <jmas softcatala org>
Date:   Fri Sep 25 15:43:02 2009 +0200

    Percentage puzzle

 po/POTFILES.in                      |    1 +
 src/GameManager.cs                  |    1 +
 src/Makefile.am                     |    1 +
 src/PuzzleGames/PuzzlePercentage.cs |  129 +++++++++++++++++++++++++++++++++++
 4 files changed, 132 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 5301c93..b3ec66d 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -61,6 +61,7 @@ src/PuzzleGames/PuzzleNumericSequence.cs
 src/PuzzleGames/PuzzleOstracism.cs
 src/PuzzleGames/PuzzlePencil.cs
 src/PuzzleGames/PuzzlePeopleTable.cs
+src/PuzzleGames/PuzzlePercentage.cs
 src/PuzzleGames/PuzzleQuadrilaterals.cs
 src/PuzzleGames/PuzzleSquareDots.cs
 src/PuzzleGames/PuzzleSquaresAndLetters.cs
diff --git a/src/GameManager.cs b/src/GameManager.cs
index a779c0a..728fb6b 100644
--- a/src/GameManager.cs
+++ b/src/GameManager.cs
@@ -71,6 +71,7 @@ public class GameManager
 		typeof (PuzzleLargerShape),
 		typeof (PuzzleHandshakes),
 		typeof (PuzzleCounting),
+		typeof (PuzzlePercentage),
 	};
 
 	static Type[] CalculationTrainersInternal = new Type[] 
diff --git a/src/Makefile.am b/src/Makefile.am
index 75c34e1..fe7a78b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -84,6 +84,7 @@ GBRAINY_CSDISTFILES =				\
 	$(srcdir)/CalculationGames/CalculationAverage.cs \
 	$(srcdir)/CalculationGames/CalculationProportions.cs \
 	$(srcdir)/CalculationGames/CalculationRatio.cs \
+	$(srcdir)/PuzzleGames/PuzzlePercentage.cs	\
 	$(srcdir)/SimpleLabel.cs	\
 	$(srcdir)/gbrainy.cs			
 
diff --git a/src/PuzzleGames/PuzzlePercentage.cs b/src/PuzzleGames/PuzzlePercentage.cs
new file mode 100644
index 0000000..2e48eab
--- /dev/null
+++ b/src/PuzzleGames/PuzzlePercentage.cs
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2009 Jordi Mas i Hernà ndez <jmas softcatala org>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+using Cairo;
+using Mono.Unix;
+using System;
+
+public class PuzzlePercentage : Game
+{
+	enum GameType
+	{
+		Discount,
+		Sales,
+		Water,
+		Total
+	}
+
+	string question, answer;
+	GameType gametype;
+
+	public override string Name {
+		get {return Catalog.GetString ("Percentage");}
+	}
+
+	public override string Question {
+		get {return question; }
+	}
+
+	public override string Answer {
+		get {
+
+			if (String.IsNullOrEmpty (answer) == true)
+				return base.Answer;
+
+			return base.Answer + " " + answer;
+		}
+	}
+
+	public override void Initialize ()
+	{
+		int ans;
+
+		gametype = (GameType) random.Next ((int) GameType.Total);
+
+		switch ((int) gametype)
+		{
+		case (int) GameType.Discount:
+			int price, discount, paid;
+
+			discount = 10 + random.Next (30);
+			price = 100 + random.Next (100);
+			paid = price - (price * discount / 100);
+			
+			question = String.Format (
+				Catalog.GetString ("After getting {0}% discount you have paid {1} monetary units for a TV set. What was the original price of the TV set?"),
+				discount, paid);
+			ans = price;
+			break;
+		case (int) GameType.Sales:
+			int sales, increase, previous;
+
+			previous = 10 + random.Next (90);
+			increase = 10 + random.Next (20);
+			sales = previous + (previous * increase / 100);
+			
+			question = String.Format (
+				Catalog.GetString ("John's shop had sales of {0} monetary units. This was an increase of {1}% over last month. What were last month sales?"),
+				sales, increase);
+			ans = previous;
+			break;
+		case (int) GameType.Water:
+			double decrease, percentage;
+
+			do
+			{
+				decrease = (1 + random.Next (70));
+				percentage = decrease / (100 - decrease) * 100;
+
+			} while (percentage != Math.Truncate (percentage));
+			
+			question = String.Format (
+				Catalog.GetString ("The amount of water in a bucket decreases by {0}%. By what percentage must the amount of water increase to reach its original value?"),
+				decrease);
+
+			answer = Catalog.GetString ("The objective is to obtain the same total amount");
+			ans = (int) percentage;
+			break;
+		default:
+			throw new Exception ("Unexpected value");
+		}
+
+		right_answer = (ans).ToString ();
+	}
+
+	public override void Draw (CairoContextEx gr, int area_width, int area_height)
+	{
+		base.Draw (gr, area_width, area_height);
+	}
+
+	public override bool CheckAnswer (string answer)
+	{	
+		if (gametype == GameType.Water) {
+			if (String.Compare (answer, right_answer + "%", true) == 0) 
+				return true;
+		}
+
+		if (String.Compare (answer, right_answer, true) == 0) 
+			return true;
+
+		return false;
+	}
+
+}