重建C++时的链接器错误 - CLI项目std :: basic_string

Question

我在Visual Studio 2008中编写了一个C++应用程序。我已经将Windows窗体添加到我的项目中，启用了CLR支持并添加了一行来实例化窗体。

因为这样做，我得到的链接错误的负载如下：

错误LNK2001：无法解析的外部符号“市民：虚拟类的std :: basic_string的<焦炭，结构的std :: char_traits <字符> ，类std :: allocator < char>> __thiscall ...“（...）

任何想法我做错了什么？

完整的错误（匿名）：

1>Linking... 
1> Creating library C:\***.lib and object C:\***.exp 
1>getProducts.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@UBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>getProducts.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall ***::GetClassName(void)const " (?GetClassName@***@@MBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) 
1>MSVCRT.lib(crtexe.obj) : error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup 
1>C:\***.exe : fatal error LNK1120: 9 unresolved externals 
1>Build log was saved at "file://c:\***\BuildLog.htm" 
1>getProducts - 10 error(s), 12 warning(s) 
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ======== 

Answer 1

如果您使用在项目中多个用户创建的文件，因为你不是变量声明为extern或者包括头文件不止一次可能会出现错误。请参阅以下网站以解答您的问题：

www.gamedev.net/page/resources/_/technical/general-programming/organizing-code-files-in-c-and-c-r1798