如何访问类外的私人数据成员？ [英] How to access private data members outside the class?

问题描述

我有一个 A类，如下所示： -

I have a class A as mentioned below:-

class A{
     int iData;
};

我不想为上面类A创建成员函数。我也不想继承上面的类A 。我不想更改 iData 的说明符。

I dont want to create member function for above class A. And also i dont want to inherit the above class A. I dont want to change the specifier of iData.

我的疑问： -

• 如何访问对象的 iData ，例如 obj1 class A ？


• 如何更改或操作 iData 对象 obj1 ？

• How can i access iData of an object say obj1 which is an instance of class A?
• How can i change or manipulate the iData of an object obj1?

请注意：使用 friend 。

推荐答案

该成员是私有的，它在类外不可见。这是公共/保护/私有修饰符的整个点。

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.

（你可能使用脏指针技巧，但我的猜测是，你会输入未定义的行为领域很快。）

(You could probably use dirty pointer tricks though, but my guess is that you'd enter undefined behavior territory pretty fast.)

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