添加 '挑战题'

挑战题

@@ -0,0 +1,21 @@
+public class Person {
+    private String name;
+    private int age;
+
+    public Person() {}
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    // 统一的基础信息打印方法
+    public void showInfo() {
+        System.out.println("姓名：" + name + "，年龄：" + age);
+    }
+
+    // getter/setter
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+    public int getAge() { return age; }
+    public void setAge(int age) { this.age = age; }
+}