在一个类中包含两种成员: 数据和函数,分别称为数据成员和成员函数｡ 在C++中把一组数据和有权调用这些数据的函数封装在一起,组成一种称为“类(class)”的数据结构｡ -In a class contains two members: data and function, referred to as a data member and member function respectively. A set of data in the c++ function enc