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package entity;
/**
* 题目实体类
* 封装题目的基本属性：题号和题目内容
* 提供格式化的字符串输出方法
*/
public class Question {
private final int number; // 题号
private final String content; // 题目内容（数学表达式）
* 构造函数
* @param number 题号（从1开始）
* @param content 题目内容
public Question(int number, String content) {
this.number = number;
this.content = content;
}
// Getter方法
public int getNumber() { return number; }
public String getContent() { return content; }
* 重写toString方法，格式化输出题目
* 格式：题号. 题目内容
* @return 格式化后的题目字符串
@Override
public String toString() {
return number + ". " + content;
