try,catch,throw语句应该怎么写？？

[gonghai78]

pTable=new struct TableStruct;
nTableCont=GetFile((char*)LPCTSTR(csFileName),pTable);

if(!nTableCont)
{
MessageBox("文件不能打开！","错误信息");
FreeMem();
PostMessage(WM_CLOSE);
}
else
{
nTableIndex=0;
while(pTable->pUpTable!=NULL)
pTable=pTable->pUpTable;

nIndexUser=0;
UpdateRecord();
}
}
else语句中出现内存泄露,怎么解决?

[Kudeet]

TRY
{
......
}
CATCH(CDBException, e)
{
.......
}END_CATCH
或在
catch(_com_error &e)
{
...
}

[DentistryDoctor]

要防止因为异常产生的内存泄漏，可以使用智能指针，也可以用
__try
{
}
__finally
{
}
《Windows核心编程》一书第23~25章是很好的参考资料。

[快乐鹦鹉]

try
{
if(!nTableCont)
{
MessageBox("文件不能打开！","错误信息");
FreeMem();
PostMessage(WM_CLOSE);
}
else
{
nTableIndex=0;
while(pTable->pUpTable!=NULL)
pTable=pTable->pUpTable;

nIndexUser=0;
UpdateRecord();
}
}
catch(_com_error &e)
{
}

[wfq771105]

up

[libraworm]

msdn索引里面查找try

[lixiaosan]

http://www.vchelp.net/wyy/tour/teach_sp_34.htm

[nineclock]

CFile* pFile = NULL;

// Constructing a CFile object with this override may throw
// a CFile exception, and won't throw any other exceptions.
// Calling CString::Format() may throw a CMemoryException,
// so we have a catch block for such exceptions, too. Any
// other exception types this function throws will be
// routed to the calling function.

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;
}

[落入凡间的猪]

try
{

}
catch(...)
{

}