类的成员包括在类中声明的所有成员，以及在该类的继承层次结构中的所有类中声明的所有成员(构造函数和析构函数除外)。

A class's members include all the members declared in the class, along with all members (except constructors and destructors) declared in all classes in its inheritance hierarchy.

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结构不能声明默认构造函数(没有参数的构造函数)或析构函数。

A struct may not declare a default constructor (a constructor without parameters) or a destructor.

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结构不能声明默认构造函数(没有参数的构造函数)或析构函数。

A struct may not declare a default constructor (a constructor without parameters) or a destructor.

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