Merge pull request #16 from B1G-SAM/Math

Add Math package

src/main/java/Math/MathPool.java

@@ -0,0 +1,34 @@
+package Math;
+import java.util.Random;
+import java.util.ArrayList;
+
+public class MathPool {
+    private ArrayList<MathQuestion> poolOfQuestions;
+    private final Random random;
+
+
+    public MathPool(){
+        random = new Random();
+    }
+
+    public void addMathQuestion(String wordProblem, int solution, int difficulty){
+        MathQuestion problem = new MathQuestion(wordProblem, solution, difficulty);
+        poolOfQuestions.add(problem);
+    }
+
+    public MathQuestion getQuestionByDifficulty(int targetDifficulty){
+        ArrayList<MathQuestion> filteredQuestions = new ArrayList<>();
+        for (MathQuestion question : poolOfQuestions) {
+            if (question.getDifficulty() == targetDifficulty) {
+                filteredQuestions.add(question);
+            }
+        }
+        if (!filteredQuestions.isEmpty()) {
+            int index = random.nextInt(filteredQuestions.size());
+            return filteredQuestions.get(index);
+        } else {
+            return null;
+        }
+    }
+
+}

src/main/java/Math/MathQuestion.java

@@ -0,0 +1,25 @@
+package Math;
+
+public class MathQuestion {
+    private String question;
+    private int answer;
+    private int difficulty;
+
+    public MathQuestion(String qn, int ans, int diff){
+        this.question = qn;
+        this.answer = ans;
+        this.difficulty = diff;
+    }
+
+    public String getQuestion(){
+        return question;
+    }
+
+    public int getDifficulty() {
+        return difficulty;
+    }
+
+    public boolean checkAns(int userAns){
+        return answer == userAns;
+    }
+}