C ++派生类函数的重新定义

Question

member function void readPayInfo() is redefined in class BonusEmployee. It now returns the value of the data member base pay plus the value of the data member bonus

class Employee
{
public:
      //constructors here
      void readPayInfo()
      {cin >> basePay;}
private:
      double basePay;
};


class BonusEmployee : public Employee
{
public:
      //constructors here
      void readPayInfo()
      {cin >> basePay >> bonus;} // NULL!
private:
      bonus;
};

how do I access basePay from parent class?

Answer 1

Since you've opted to make Employee::basePay private there is no way to directly access it from a subclass. I think you have two options:

1. Add a getter to Employee , or
2. Change the visibility of Employee::basePay to protected .