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我不明白我做错了什么

通用.h

#pragma once
#include "Flisr.h"
#import <msxml3.dll> named_guids
MSXML2::IXMLDOMDocumentPtr   m_plDomDocument;
MSXML2::IXMLDOMElementPtr    m_pDocRoot;

通用.cpp

#include "Common.h"

//some functions

Flisr.cpp

#include "Flisr.h"
#include "Common.h"

//some functions from Common

错误是：

error LNK2005: "class _com_ptr_t<class _com_IIID<struct MSXML2::IXMLDOMDocument,&struct __s_GUID const _GUID_2933bf81_7b36_11d2_b20e_00c04f983e60> > m_plDomDocument" (?m_plDomDocument@@3V?$_com_ptr_t@V?$_com_IIID@UIXMLDOMDocument@MSXML2@@$1?_GUID_2933bf81_7b36_11d2_b20e_00c04f983e60@@3U__s_GUID@@B@@@@A) already defined in Common.obj

error LNK2005: "class _com_ptr_t<class _com_IIID<struct MSXML2::IXMLDOMElement,&struct __s_GUID const _GUID_2933bf86_7b36_11d2_b20e_00c04f983e60> > m_pDocRoot" (?m_pDocRoot@@3V?$_com_ptr_t@V?$_com_IIID@UIXMLDOMElement@MSXML2@@$1?_GUID_2933bf86_7b36_11d2_b20e_00c04f983e60@@3U__s_GUID@@B@@@@A) already defined in Common.obj
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1 回答 1

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每次"#include "Common.h"您都在定义一组新的对象（全局变量），称为m_plDomDocument和m_pDocRoot。在程序的范围内只允许每个之一，因此它们已经定义的错误。

于 2017-04-07T03:48:48.290 回答