Question

在下面的过度简化示例中，class Derived继承了class Base的私有成员/方法。我想要做的是能够在Derived类的继承结构中添加一个额外的成员（double salary）。

struct Person {
  int age;
  int height;
};

class Base {
  protected:
     Person worker;
  public:
     double hours (Person *employee);
};

class Derived: public Base {
  private:
    //Class has an inherited member named "Person worker"
    //How do I add new member "double salary" to struct "Person worker"
    double salary (Person *manager); //A method that will rely on "double salary" 
};

也许这样的事情（如下面Vlad所建议的那样）可行，但是有更好的方法吗？

struct Person {
  int age;
  int height;
};

struct Person2: Person {
  double salary;
}

class Base {
  private:
     Person worker;

  public:
     double hours (Person *employee);
};

class Derived: public Base {
  private:
    Person2 fulltime;
    double salary (Person2 *manager); //A method that will rely on "double salary" 
};

如果我错了，请更正我，但Person worker仍然由派生类继承，除了它无法直接访问（但是hours方法，也是继承的，可以访问它，因为它是基类的一部分）。

Answer 1

如果我理解正确你需要在hierarhy中再引入一个课程。例如

struct Employee : Person
{
    double salary;
};

将成员添加到从基类继承的struct

1 个答案: