有限自动机VC++MFC资源-CSDN下载

共28个文件

h：4个

cpp：3个

obj：3个

需积分: 9 154 浏览量 2008-11-26 11:27:11 上传评论 1 收藏 1.84MB RAR 举报

有限自动机（Finite Automaton，FA）是一种计算模型，它能根据给定的一组规则对输入序列进行识别或分类。在计算机科学中，有限自动机主要用于处理形式语言，特别是文本解析、编译器设计和模式匹配等领域。在这个场景中，我们讨论的是如何使用VC++编程环境，结合MFC（Microsoft Foundation Classes）库来实现一个有限自动机。 VC++是Microsoft开发的一种集成开发环境，支持C++编程，用于创建Windows应用程序。MFC是一组C++类库，它提供了构建用户界面、处理系统事件、数据库连接等功能，使得开发者能够更高效地编写Windows应用程序。在实现有限自动机时，我们首先需要定义状态和转换函数。状态是有限自动机在处理输入时可能处于的不同情况。每个状态都有一个或多个转换，这些转换定义了当特定输入字符出现时，自动机应如何从当前状态转移到另一个状态。在MFC中，我们可以创建一个类来表示状态，并用成员函数表示转换。例如，我们可以创建一个名为`State`的类，包含一个表示状态的枚举和一个映射结构，该结构将字符映射到新的状态。对于转换函数，我们可以定义一个`transition()`方法，接收当前状态和输入字符，然后返回新的状态。 ```cpp class State { public: enum States { Initial, Numeral, Identifier, ... }; std::map<char, States> transitions; States transition(char input) const { auto it = transitions.find(input); if (it != transitions.end()) return it->second; else return Invalid; // 无效输入或未定义的转换 } }; ``` 接下来，我们需要构建自动机的核心逻辑，这通常包括一个主循环，读取输入字符，调用状态的`transition()`方法，直到所有输入被处理。MFC提供了一些事件处理机制，如`CWinApp`的`OnIdle()`函数，可以用来持续处理输入。 ```cpp void CMyApp::OnIdle(LONG lCount) { static State currentState = State::Initial; char input; // 从输入设备获取字符 if (GetNextInput(input)) { currentState = currentState.transition(input); // 根据新状态处理输入 switch (currentState) { case State::Numeral: // 处理数字 break; case State::Identifier: // 处理标识符 break; ... } } } ``` 在这个例子中，`GetNextInput()`是假设的函数，用于从输入设备读取字符。实际实现时，你可能需要使用MFC的`GetMessage()`或`PeekMessage()`函数来处理Windows消息。在描述中提到的"判断输入字符的类型"，可以通过在转换函数中定义特定的状态和规则来实现。例如，如果连续的数字字符使自动机进入`Numeral`状态，而字母字符则可能将自动机带入`Identifier`状态。一旦输入序列处理完毕，可以根据最终状态来判断输入的类型。总结来说，通过VC++和MFC，我们可以构建一个有限自动机，它根据预定义的规则对输入字符流进行分析，从而判断其类型。这个过程涉及状态的定义、转换规则的设置以及事件驱动的输入处理。通过这种方式，我们可以实现诸如识别常数、字符等特定语言结构的功能。

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.rar （28个子文件）

有限自动机

NFA.ncb 81KB

NFA.dsp 4KB

StdAfx.cpp 205B

NFA.opt 48KB

resource.h 1003B

NFA.rc 5KB

NFA.cpp 2KB

NFA.APS 21KB

NFA.clw 1KB

NFADlg.cpp 7KB

Debug

NFA.pch 5.37MB

vc60.pdb 356KB

vc60.idb 329KB

NFA.obj 14KB

NFADlg.obj 43KB

NFA.pdb 377KB

NFA.res 3KB

StdAfx.obj 103KB

NFA.ilk 282KB

NFA.exe 108KB

ReadMe.txt 3KB

StdAfx.h 1KB

NFA.plg 936B

NFA.h 1KB

NFA.dsw 529B

res

NFA.ico 1KB

NFA.rc2 395B

NFADlg.h 1KB

======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : NFA ======================================================================== AppWizard has created this NFA application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your NFA application. NFA.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. NFA.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CNFAApp application class. NFA.cpp This is the main application source file that contains the application class CNFAApp. NFA.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. NFA.clw This file contains information used by ClassWizard to edit existing classes or add new classes. ClassWizard also uses this file to store information needed to create and edit message maps and dialog data maps and to create prototype member functions. res\NFA.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file NFA.rc. res\NFA.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// AppWizard creates one dialog class: NFADlg.h, NFADlg.cpp - the dialog These files contain your CNFADlg class. This class defines the behavior of your application's main dialog. The dialog's template is in NFA.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named NFA.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, and your application is in a language other than the operating system's current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don't do this, some of the UI elements of your application will remain in the language of the operating system. /////////////////////////////////////////////////////////////////////////////

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