ADD file via upload

src/SeniorQuestionGenerator.java

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+public class SeniorQuestionGenerator extends AbstractQuestionGenerator{
+	private static final String[] OPERATORS = {"+", "-", "×", "÷"};
+    private static boolean h = false;
+    private static StringBuilder q;
+    
+    @Override
+    public String generateQuestion() {
+        int attempts = 0;
+        while (attempts < 100) {
+            attempts++;
+            
+            int operandCount = random.nextInt(5) + 1; // 1~5个操作数
+            StringBuilder question = new StringBuilder();
+            boolean hasTrigOperator = false;
+            
+            AddTrigOperator(operandCount, hasTrigOperator, question);
+            hasTrigOperator = h;
+            question = q;
+            ForceAddTrigOperator(hasTrigOperator, question);
+            hasTrigOperator = h;
+            question = q;
+                
+            String result = addReasonableParentheses(question.toString(), operandCount);
+            result = ensureBalancedParentheses(result);
+            result = Revise(result);
+            
+            
+            if (isQuestionUnique(result) && isValidParentheses(result) && 
+                (hasOperator(result) || hasTrigOperator)) {
+                addToGeneratedQuestions(result);
+                String regex = "(?<!\\s)\\)(?=[^)]*$)";
+                result = result.replaceAll(regex, " )");
+                return result;
+            }
+ 
+        }
+        return "sin 30° + cos 45°"; // 备用题目
+    }
+    
+    private String addReasonableParentheses(String expression, int operandCount) {
+        if (operandCount <= 2 || random.nextDouble() < 0.4) {
+            return expression;
+        }
+        
+        String[] parts = expression.split(" ");
+        if (parts.length < 5) return expression;
+        
+        StringBuilder newExpr = new StringBuilder();
+        int start = random.nextInt(Math.max(1, parts.length / 2 - 1));
+        int end = start + 1 + random.nextInt(Math.max(1, parts.length / 2 - start - 1));
+        
+        for (int i = 0; i < parts.length; i++) {
+            if (i == start * 2 && start * 2 < parts.length - 3) {
+                newExpr.append("( ");
+            }
+            newExpr.append(parts[i]);
+            if (i == end * 2 && i < parts.length - 2 && end * 2 > start * 2 + 2) {
+                newExpr.append(" )");
+            }
+            if (i < parts.length - 1) {
+                newExpr.append(" ");
+            }
+        }
+        
+        return newExpr.toString().trim();
+    }
+    
+    private String Revise(String expression) {
+    	
+    	if(!expression.contains("(")) {
+    		return expression;
+    	}
+    	
+    	String[] parts = expression.split(" ");
+    	int count = 0;
+    	while(count < 2) {
+    		count++;
+    		for (int i = 1; i < parts.length - 1; i++) {
+    		    if (parts[i].equals("(") && (parts[i+1].equals("+") || parts[i+1].equals("-") || parts[i+1].equals("×") || parts[i+1].equals("÷"))) {
+                    String t = parts[i];
+                    parts[i] = parts[i+1];
+                    parts[i+1] = t;
+                }
+    		    if (parts[i].equals(")") && (parts[i-1].equals("+") || parts[i-1].equals("-") || parts[i-1].equals("×") || parts[i-1].equals("÷")
+    				    || parts[i-1].equals("cos") || parts[i-1].equals("sin") || parts[i-1].equals("tan") || parts[i-1].equals("sincos") || parts[i-1].equals("sintan")
+    				    || parts[i-1].equals("cossin") || parts[i-1].equals("costan") || parts[i-1].equals("tansin") || parts[i-1].equals("tancos"))) {
+                    String t = parts[i];
+                    parts[i] = parts[i-1];
+                    parts[i-1] = t;
+                }
+    		
+    	    }
+    	}
+    	StringBuilder result = new StringBuilder();
+    	for (int i = 0; i < parts.length; i++) {
+            if (!parts[i].isEmpty()) {
+                result.append(parts[i]).append(" ");
+            }
+        }
+    	return result.toString();
+    	
+    }
+    
+    
+    private void AddTrigOperator(int operandCount, boolean hasTrigOperator, StringBuilder question) {
+    	for (int i = 0; i < operandCount; i++) {
+            // 决定是否添加三角函数
+            if (!hasTrigOperator && random.nextDouble() < 0.4) {
+                String trigOp = generateOperator(new String[]{"sin", "cos", "tan"});
+                int angle = random.nextInt(101);
+                
+                // 随机决定是否嵌套三角函数（30%概率）
+                if (random.nextDouble() < 0.3) {
+                    String nestedTrig = generateOperator(new String[]{"sin", "cos", "tan"});
+                    while (nestedTrig.equals(trigOp)) {
+                        nestedTrig = generateOperator(new String[]{"sin", "cos", "tan"});
+                    }
+                    question.append(trigOp).append(nestedTrig).append(" ").append(angle).append("°");
+                } else {
+                    question.append(trigOp).append(" ").append(angle).append("°");
+                }
+                hasTrigOperator = true;
+            } else {
+                question.append(generateNumber());
+            }
+            
+            if (i < operandCount - 1) {
+                String operator = generateOperator(OPERATORS);
+                question.append(" ").append(operator).append(" ");
+            }
+        }
+    	h = hasTrigOperator;
+        q = question;
+    }
+    
+    private void ForceAddTrigOperator(boolean hasTrigOperator, StringBuilder question) {
+    	// 如果还没有三角函数，强制添加一个
+        if (!hasTrigOperator) {
+            String[] parts = question.toString().split(" ");
+            int pos = random.nextInt(parts.length / 2 + 1) * 2;
+            if (pos >= parts.length) pos = parts.length - 1;
+            
+            String trigOp = generateOperator(new String[]{"sin", "cos", "tan"});
+            int angle = random.nextInt(101);
+            
+            // 随机决定是否嵌套
+            if (random.nextDouble() < 0.3) {
+                String nestedTrig = generateOperator(new String[]{"sin", "cos", "tan"});
+                while (nestedTrig.equals(trigOp)) {
+                    nestedTrig = generateOperator(new String[]{"sin", "cos", "tan"});
+                }
+                parts[pos] = trigOp + nestedTrig + " " + angle + "°";
+            } else {
+                parts[pos] = trigOp + " " + angle + "°";
+            }
+            question = new StringBuilder(String.join(" ", parts));
+            hasTrigOperator = true;
+        }
+        h = hasTrigOperator;
+        q = question;
+    }
+    
+}