包含：对象的演化，数据抽象，隐藏实现，初始化与清除，函数重载与缺省参数，输入输出流介绍，常量，内联函数，命名控制，引用和拷贝构造函数-Include: the evolution of object, data abstraction, hiding the realization of initialization and removal, function overloading and default parameters, input and output streams, the co