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* Copyright (C) 2007 Jordi Mas i Hernàndez <jmas@softcatala.org>
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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public class CalculationCloserFraction : Game
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private double question_num;
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private const int options_cnt = 4;
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private double []options;
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private ArrayListIndicesRandom random_indices;
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public override string Name {
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get {return Catalog.GetString ("Closer fraction");}
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public override Types Type {
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get { return Game.Types.MathTrainer;}
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public override string Question {
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get {return String.Format (
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Catalog.GetString ("Which of the following numbers is closer to {0:##0.###}? Answer {1}, {2}, {3} or {4}."), question_num,
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GetPossibleAnswer (0), GetPossibleAnswer (1), GetPossibleAnswer (2), GetPossibleAnswer (3));}
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public override string Answer {
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string answer = base.Answer + " ";
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int ans_idx = random_indices[which];
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answer += String.Format (Catalog.GetString ("The result of the operation {0} / {1} is {2:##0.###}"),
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options[ans_idx * 2], options[(ans_idx * 2) + 1], question_num);
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public override void Initialize ()
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options = new double [options_cnt * 2];
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int i, ans_idx, basenum, randnum;
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switch (CurrentDifficulty) {
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case Difficulty.Medium:
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case Difficulty.Master:
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while (done == false) {
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options[0 + 0] = basenum + random.Next (randnum);
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options[0 + 1] = basenum + random.Next (randnum);
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options[2 + 0] = options[0 + 0] + random.Next (2);
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options[2 + 1] = options[0 + 1] + random.Next (2);
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options[(2 * 2) + 0] = options[0 + 0] - random.Next (5);
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options[(2 * 2) + 1] = options[0 + 1] - random.Next (5);
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options[(3 * 2) + 0] = options[0 + 0] + random.Next (5);
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options[(3 * 2) + 1] = options[0 + 1] + random.Next (5);
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// No repeated answers
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for (int num = 0; num < options_cnt; num++)
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for (int n = 0; n < options_cnt; n++)
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if (n == num) continue;
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if (options [(num * 2) + 0] / options [(num * 2) + 1] ==
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options [(n * 2) + 0] / options [(n * 2) + 1]) {
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// No numerator = denominator (1 value)
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if (options [0 + 0] == options [0 + 1]) continue;
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if (options [(1 * 2) + 0] == options [(1 * 2) + 1]) continue;
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if (options [(2 * 2) + 0] == options [(2 * 2) + 1]) continue;
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if (options [(3 * 2) + 0] == options [(3 * 2) + 1]) continue;
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for (i = 0; i < options_cnt * 2; i++) {
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if (i < options_cnt * 2)
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random_indices = new ArrayListIndicesRandom (4);
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random_indices.Initialize ();
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which = random.Next (options_cnt);
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ans_idx = random_indices[which];
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question_num = options[ans_idx * 2] / options[(ans_idx * 2) + 1];
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right_answer += GetPossibleAnswer (which);
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public override void Draw (CairoContextEx gr, int area_width, int area_height)
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double x = DrawAreaX + 0.25, y = DrawAreaY + 0.16;
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base.Draw (gr, area_width, area_height);
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gr.SetPangoLargeFontSize ();
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for (int i = 0; i < options_cnt; i++)
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indx = random_indices[i];
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gr.ShowPangoText (String.Format ("{0}) {1}", GetPossibleAnswer (i) , options [indx * 2] + " / " + options [(indx * 2) +1]));
added
removed
src/CalculationGames/CalculationCloserFraction.cs
