CRC循环冗余检测

				// Crc32.cpp : Defines the class behaviors for the application.
				//
				
				#include "stdafx.h"
				#include "Crc32.h"
				#include "Crc32Dlg.h"
				
				#ifdef _DEBUG
				#define new DEBUG_NEW
				#undef THIS_FILE
				static char THIS_FILE[] = __FILE__;
				#endif
				
				/////////////////////////////////////////////////////////////////////////////
				// CCrc32App
				
				BEGIN_MESSAGE_MAP(CCrc32App, CWinApp)
					//{{AFX_MSG_MAP(CCrc32App)
					//}}AFX_MSG
					ON_COMMAND(ID_HELP, CWinApp::OnHelp)
				END_MESSAGE_MAP()
				
				/////////////////////////////////////////////////////////////////////////////
				// CCrc32App construction
				
				CCrc32App::CCrc32App()
				{
				}
				
				/////////////////////////////////////////////////////////////////////////////
				// The one and only CCrc32App object
				
				CCrc32App theApp;
				
				/////////////////////////////////////////////////////////////////////////////
				// CCrc32App initialization
				
				BOOL CCrc32App::InitInstance()
				{
					// Standard initialization
				
				#ifdef _AFXDLL
					Enable3dControls();			// Call this when using MFC in a shared DLL
				#else
					Enable3dControlsStatic();	// Call this when linking to MFC statically
				#endif
				
					CCrc32Dlg dlg;
					m_pMainWnd = &dlg;
					dlg.DoModal();
				
					// Since the dialog has been closed, return FALSE so that we exit the
					//  application, rather than start the application's message pump.
					return FALSE;
				}