Visual C++编程技巧典型案例解析上

======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : XYCALC ======================================================================== 计算器程序说明如下： 部分类的说明如下： CAboutDlg： 关于对话框类 CColorButton：彩色按钮类 CMFECTToolTip：按钮的提示类 CCountDlg： 统计对话框类 CXYCALCDlg：标准型对话框类 CKXdlg：科学型对话框 一．对于标准型对话框： 在计算时不考虑算符优先级：可以这样处理： 定义：bool m_operavail 值为0时，输入数据，取得数据后，其值为1。 当按下运算符时，若该值为1，则计算结果，然后，将其置0。 1． 对于0~9 10个数字，共用OnClickedNumber( ) 函数。 2． 每次输入完数据后，调用updatedisp() 函数显示。 3． 按下运算符按钮后，调用perform（）函数，并记下此次的运算符。每次计算刚刚输入的两个数据，不考虑优先级。运算符定义为枚举类型。 4． 设置double memoryvalue，用来存储数据于存储区。 二．对于科学型对话框： 在设计时，考虑到优先级，采用类似与堆栈的操作。 同时，由于有A.双字，字，字节三种字长，以及B.十进制，二进制，八进制，十六进制四种进制，所以，在输入，输出，计算，以及各种进制转换时都要考虑上述A,B两种情况。 1．将输入的各种进制数据转化为十进制存储，计算后，再次转化为各种进制输出。 2．输入数据时，调用clicknumber（）函数，和input（ ）函数用来限制数据的范围。对于A~F，共用ClickNumberAF（ ）函数。 3．分别编写函数：enable10（ ），enable2（ ）， enable8（ ）， enable16（ ）来控制对话框中按钮的可用性。Enablefunc（ ）用来控制部分函数按钮的可用性， enablecount（ ）用来控制统计功能按钮的可用性。 4．分别编写函数：disp16（），disp２（），disp８（）用来显示各种进制的数据和结果。 5． 每次按下运算符按钮后，记下该运算符，并调用pushfh（）函数。若该运算符优先级大于栈顶运算符，则压入，否则，计算完结果后，再压入。其间，考虑到括号，对其进行类似处理。 6． 对于其他运算函数，作同样处理。 7． 另外，用到统计函数，设置非模式对话框CCountDlg。设置extern CCountDlg* g_pmodless 与科学型对话框传递数据。 8． 对于菜单中的复制，粘贴，用static Cstring fuzhi 变量进行数据传递。 9． 对于按钮的颜色，用到CcolorButton类，对于按钮提示，用到CMFECTToolTip类。 三．帮助文件。 //使用HelPWorkshop 来制作。 AppWizard has created this XYCALC 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 XYCALC application. XYCALC.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. XYCALC.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CXYCALCApp application class. XYCALC.cpp This is the main application source file that contains the application class CXYCALCApp. XYCALC.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++. XYCALC.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\XYCALC.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file XYCALC.rc. res\XYCALC.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: XYCALCDlg.h, XYCALCDlg.cpp - the dialog These files contain your CXYCALCDlg class. This class defines the behavior of your application's main dialog. The dialog's template is in XYCALC.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Help Support: hlp\XYCALC.hpj This file is the Help Project file used by the Help compiler to create your application's Help file. hlp\*.bmp These are bitmap files required by the standard Help file topics for Microsoft Foundation Class Library standard commands. hlp\*.rtf This file contains the standard help topics for standard MFC commands and screen objects. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named XYCALC.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. /////////////////////////////////////////////////////////////////////////////