定义一个时间类Time，类中有三个数据成员(Hour,Minute,Second)和两个成员函数(SetTime和PrintTime)。SetTime根据传递的三个参数为对象设置时间；PrintTime负责将对象表示的时间显示输出。在main函数中定义一个时间类对象，设置时间为9点20分30秒并显示该时间。-Define a time type Time, the class has three data members (Hour, Minute, Second) and two member functions (SetTime and PrintTime). SetTime according to three parameters passed to the object to set the time　PrintTime will object that the time for display output. In the main function defined in a time of class objects, set the time of 9:20:30 and displays the time.