添加 'src/JuniorQuestionGenerator.java'

src/JuniorQuestionGenerator.java

@@ -0,0 +1,69 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class JuniorQuestionGenerator extends AbstractQuestionGenerator {
+    private static final String[] OPERATORS = {"+", "-", "×", "÷"};
+    private static final String[] ADVANCED_OPS = {"²", "√"};
+
+    @Override
+    public String generateQuestion(int operandCount, Random random) {
+        String advancedOp = ADVANCED_OPS[random.nextInt(ADVANCED_OPS.length)];
+
+        if (advancedOp.equals("²")) {
+            return generateWithSquare(operandCount, random);
+        } else {
+            return generateWithSquareRoot(operandCount, random);
+        }
+    }
+
+    private String generateWithSquare(int operandCount, Random random) {
+        String baseExpression = generateBasicExpression(operandCount, random, OPERATORS);
+
+        // 修正：用空格连接，保持格式
+        String[] parts = baseExpression.split(" ");
+        int squarePos = findNumberPosition(parts);
+        if (squarePos >= 0) {
+            parts[squarePos] = parts[squarePos] + "²";
+        }
+        return String.join(" ", parts); // 修正：用空格连接
+    }
+
+    private String generateWithSquareRoot(int operandCount, Random random) {
+        StringBuilder question = new StringBuilder();
+        question.append("√").append(random.nextInt(MAX_OPERAND) + MIN_OPERAND); // 修正：应该是√而不是v
+
+        if (operandCount > 1) {
+            String remainingExpression = generateBasicExpression(operandCount - 1, random, OPERATORS);
+            String[] parts = remainingExpression.split(" ", 2);
+            if (parts.length > 1) {
+                question.append(" ").append(parts[1]);
+            }
+        }
+        return question.toString();
+    }
+
+    private int findNumberPosition(String[] parts) {
+        List<Integer> numberPositions = new ArrayList<>();
+        for (int i = 0; i < parts.length; i++) {
+            if (isNumber(parts[i])) {
+                numberPositions.add(i);
+            }
+        }
+        return numberPositions.isEmpty() ? -1 : numberPositions.get(new Random().nextInt(numberPositions.size()));
+    }
+
+    private boolean isNumber(String str) {
+        try {
+            Integer.parseInt(str);
+            return true;
+        } catch (NumberFormatException e) {
+            return false;
+        }
+    }
+
+    @Override
+    public String getQuestionType() {
+        return "初中";
+    }
+}