• To fix:
  • Override the function in the derived class
  • call the base class' method explicitly

class Manager : public Employee
{
   . . .
   virtual void set_salary(int new_salary);
   void set_salary(int new_salary, int yearly_bonus);
};

void Manager::set_salary(int new_salary)
{
   Employee::set_salary(new_salary); // Invoke the base class function
}