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C++ protected 关键字

❮ C++ 关键字


例子

使用 protected 关键字使属性可被派生类访问

// Base class
class Employee {
  protected: // Protected access specifier
    int salary;
};

// Derived class
class Programmer: public Employee {
  public:
    int bonus;
    void setSalary(int s) {
      salary = s;
    }
    int getSalary() {
      return salary;
    }
};

int main() {
  Programmer myObj;
  myObj.setSalary(50000);
  myObj.bonus = 15000;
  cout << "Salary: " << myObj.getSalary() << "\n";
  cout << "Bonus: " << myObj.bonus << "\n";
  return 0;
}

亲自尝试 »


定义和用法

The protected 关键字是访问修饰符,它将属性和方法声明为 protected,这意味着它们只能被类内部的方法或其派生类的


相关页面

在我们的 C++ 访问修饰符教程 中了解有关访问修饰符的更多信息。

在我们的 C++ 继承教程 中了解有关派生类的更多信息。


❮ C++ 关键字

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