《HeadFirst设计模式》观察者模式c++实现代码

======================================================================== CONSOLE APPLICATION : Observer ======================================================================== AppWizard has created this Observer application for you. This file contains a summary of what you will find in each of the files that make up your Observer application. Observer.dsp This file (the project file) contains information at the project level and is used to build a single project or subproject. Other users can share the project (.dsp) file, but they should export the makefiles locally. Observer.cpp This is the main application source file. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named Observer.pch and a precompiled types file named StdAfx.obj. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. /////////////////////////////////////////////////////////////////////////////