An access label controls whether a member is accessible outside the class.

这些操作和数据是类的一部分，也称为类的成员。

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Realizing the access of (class?)static member function to class non-static member.

实现了让类的静态成员函数访问类中非静态成员。

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Realizing the access of (class?)static member function to class non-static member.

实现了让类的静态成员函数访问类中非静态成员。

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