请示范一下TRY的用法

[scxy]

[scxy]

请各位关注谢谢

[ytby]

TRY
{
}
CATCH_ALL( e )
{
}
END_CATCH_ALL

[scxy]

e在哪儿定义，怎样定义，请别见笑，我很菜，谢谢

[scxy]

请不吝赐教

[scxy]

push

[prog_st]

The following example shows how to examine the contents of a CFileException. Other exception types can be examined similarly.

try
{
// Do something to throw a file exception.
}
catch( CFileException* theException )
{
if( theException->m_cause == CFileException::fileNotFound )
TRACE( "File not found\n" );
theException->Delete();
}

[蒋晟]

TRY
{
pFile = new CFile(_T("C:\\WINDOWS\\SYSTEM.INI"),
CFile::modeRead | CFile::shareDenyNone);

DWORD dwLength = pFile->GetLength();

CString str;
str.Format(_T("Your SYSTEM.INI file is %u bytes long."),
dwLength);

AfxMessageBox(str);
}
CATCH(CFileException, pEx)
{
// Simply show an error message to the user.

pEx->ReportError();
}
AND_CATCH(CMemoryException, pEx)
{
// We can't recover from this memory exception, so we'll
// just terminate the app without any cleanup. Normally, an
// an application should do everything it possibly can to
// clean up properly and _not_ call AfxAbort().

AfxAbort();
}
END_CATCH

// If an exception occurs in the CFile constructor,
// the language will free the memory allocated by new
// and will not complete the assignment to pFile.
// Thus, our clean-up code needs to test for NULL.

if (pFile != NULL)
{
pFile->Close();
delete pFile;
}