C++未解析的外部

Question

有谁知道这意味着什么？

1>  Generating Code...
1>BlankWindowDXbaseImpl.obj : error LNK2019: unresolved external symbol "public: __thiscall DXBase::DXBase(void)" (??0DXBase@@QAE@XZ) referenced in function "public: __thiscall BlankWindowDXBaseImpl::BlankWindowDXBaseImpl(void)" (??0BlankWindowDXBaseImpl@@QAE@XZ)
1>BlankWindowDXbaseImpl.obj : error LNK2019: unresolved external symbol "public: virtual __thiscall DXBase::~DXBase(void)" (??1DXBase@@UAE@XZ) referenced in function "public: virtual __thiscall BlankWindowDXBaseImpl::~BlankWindowDXBaseImpl(void)" (??1BlankWindowDXBaseImpl@@UAE@XZ)
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall DXBase::shutdown(void)" (?shutdown@DXBase@@QAEXXZ) referenced in function _wWinMain@16
1>main.obj : error LNK2019: unresolved external symbol "public: bool __thiscall DXBase::initalize(struct HINSTANCE__ *,struct HWND__ *)" (?initalize@DXBase@@QAE_NPAUHINSTANCE__@@PAUHWND__@@@Z) referenced in function _wWinMain@16
1>C:\backup\development\directXworkspace\BlankWindow\Debug\BlankWindow.exe : fatal error LNK1120: 4 unresolved externals

Answer 1

这意味着您有未解析的外部符号.

什么是符号？符号可以是变量,类,成员函数或函数.

为什么他们没有解决？您的代码的某些部分(或您正在使用的库)依赖于这些符号而未找到它们,因为您没有链接正确的库或实现它们.