C++ メンバー関数の説明: オブジェクト メソッドの構文とスタイル ガイド

return_type class_name::function_name(parameter_list) {
  // function body
}

class Student {

 public:

  // 构造函数
  Student(std::string name, int age) : name(name), age(age) {}

  // 成员函数用于获取姓名
  std::string get_name() {
    return name;
  }

  // 成员函数用于设置姓名
  void set_name(std::string new_name) {
    name = new_name;
  }

  // 成员函数用于获取年龄
  int get_age() {
    return age;
  }

  // 成员函数用于设置年龄
  void set_age(int new_age) {
    age = new_age;
  }

 private:
  std::string name;
  int age;
};

int main() {
  // 创建一个学生对象
  Student student("John Doe", 20);

  // 使用成员函数获取和设置学生信息
  std::cout << "Student name: " << student.get_name() << std::endl;
  student.set_name("Jane Smith");
  std::cout << "Student name (after change): " << student.get_name() << std::endl;

  std::cout << "Student age: " << student.get_age() << std::endl;
  student.set_age(21);
  std::cout << "Student age (after change): " << student.get_age() << std::endl;

  return 0;
}

Student name: John Doe
Student name (after change): Jane Smith
Student age: 20
Student age (after change): 21