1、设计一个用于人事管理的People（人员）类。考虑到通用性，这里只抽象出所有类型人员都具有的属性：number（编号）、sex（性别）、birthday（出生日期）、id（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、聚集。
2、对people类重载“==”运算符和“=”运算符，“==”运算符判断两个people类对象的id属性是否相等；“=”运算符实现people类对象的赋值操作。(Design a People (personnel) class for personnel management. In view of generality, only the properties of all types of people are abstracted: number (numbering), sex (sex), birthday (date of birth), ID (ID number) and so on. The "birth date" is defined as a "date" class embedded child object. Member function is used to input and display personnel information. The requirements include: constructor and destructor, copy constructor, inline member function, and aggregate)