Partner_Project/src/model/HighMaker.java

package model;

public class HighMaker extends Student {
    final static String[] binaryOps = {"+", "-", "*", "/"}; // 操作符
    final static String[] trigOps = {"sin", "cos", "tan"};
    int operandCount;
    String[] questionParts; // 操作数
    boolean[] specialOpFlags; // 特殊操作符索引序列
    int parenStart;
    int parenEnd;

    public HighMaker(String name, String password, String path) {
        super(name, password, path);
    }

    // 数据预处理
    public void getRandom() {
        this.operandCount = random.nextInt(4) + 2;
        this.questionParts = new String[this.operandCount];

        // 使用基类方法随机决定特殊操作符的数量和位置
        this.specialOpFlags = randomMaker(this.operandCount);

        // 生成题目各部分
        for (int i = 0; i < operandCount; i++) {
            int operand = random.nextInt(100) + 1;
            if (specialOpFlags[i]) {
                String op = trigOps[random.nextInt(trigOps.length)];
                questionParts[i] = op + "(" + operand + ")";
            } else {
                questionParts[i] = String.valueOf(operand);
            }
        }

        // 使用基类方法生成有效括号
        int[] parenPos = bracketMaker(this.operandCount);
        this.parenStart = parenPos[0];
        this.parenEnd = parenPos[1];
    }

    @Override
    protected String makeOneQuestion() {
        getRandom();
        StringBuilder question = new StringBuilder();

        for (int i = 0; i < operandCount; i++) {
            if (i == parenStart) {
                question.append("(");
            }
            question.append(questionParts[i]);
            if (i == parenEnd) {
                question.append(")");
            }

            if (i < operandCount - 1) {
                String op = binaryOps[random.nextInt(binaryOps.length)];
                question.append(" ").append(op).append(" ");
            }
        }
        return question.toString();
    }

}