设计并测试一个“人员”类。属性包括：编号、性别、出生日期、身份证号等等。其中“出生日期”定义为一个“日期”类内嵌子对象。用成员函数实现对人员信息的录入和显示。要求包括：构造函数和析构函数、拷贝构造函数、内联成员函数-Design and test a " person"　category. Attributes include: number, gender, birth date, ID number and so on. The " birth date"　is defined as a " date"　class embedded child objects. Achieved with the member functions of personnel information input and display. Requirements include: the constructor and destructor, copy constructor, inline member function