如何在不交“朋友"的情况下访问类外的私有数据成员?
我有一个 class A 如下所述:-
I have a class A as mentioned below:-
class A{
int iData;
};
我既不想创建成员函数，也不想继承上面的class A，也不想改变iData的说明符.
I neither want to create member function nor inherit the above class A nor change the specifier of iData.
我的疑问:-
- 如何访问
iData对象的obj1，它是class A的一个实例? - 如何更改或操作对象
obj1的iData?
- How to access
iDataof an object sayobj1which is an instance ofclass A? - How to change or manipulate the
iDataof an objectobj1?
注意:不要使用friend.
推荐答案
你不能.该成员是私有的，在课堂外不可见.这就是 public/protected/private 修饰符的全部意义.
You can't. That member is private, it's not visible outside the class. That's the whole point of the public/protected/private modifiers.
(虽然你可能会使用脏指针技巧，但我猜你会很快进入未定义的行为领域.)
(You could probably use dirty pointer tricks though, but my guess is that you'd enter undefined behavior territory pretty fast.)