[英]Issue importing functions from DLL C++. LNK 2001
I have two projects. 我有两个项目。 One creates a DLL and the other should use functions declared in the DLL, but I have problems implementing this.
一个创建一个DLL,另一个应该使用在DLL中声明的函数,但是实现此问题。
In the DLL project I have these declarations: 在DLL项目中,我有以下声明:
using namespace XClass;
extern "C" __declspec(dllexport) int Compute(XClass::XClassInput input, XClassOutput &XClassOutput);
extern "C" __declspec(dllexport) int Init( string configFileName);
class xclass
{
public:
xclass(void);
xclass(constellation &Constellation, XClass::XClassConfig &XClassConfig);
void ComputeWeightingMatrix(constellation &xclass_constellation, char flagIntCont);
void ComputeGMatrix(constellation &Constellation, XClass::XClassInput &input);
private:
int _numberOfSystemStates;
};
In the project that has to use the DLL functions I have this: 在必须使用DLL函数的项目中,我有以下内容:
int _tmain(int argc, _TCHAR* argv[])
{
XClass::XClassConfig xClassConfig;
XClassOutput xClassOutput;
XClass::XClassInput input;
init(input, xClassOutput );
constellation* class_constellation = new constellation(input, xClassConfig);
xclass* algorithm = new xclass(*xclass_constellation, xClassConfig);
algorithm->ComputeWeightingMatrix(*xclass_constellation, 'i');
return 0;
}
The code for the ComputeWeighting Matrix function: ComputeWeighting Matrix函数的代码:
void xclass::ComputeWeightingMatrix(constellation &Constellation, char flagIntCont)
{
double sigma = 0.0;
long error;
...
}
When I try to build I get his: 当我尝试构建时,我得到了他:
error LNK2001: unresolved external symbol "public: void __thiscall xclass::ComputeWeightingMatrix(class constellation &,char)" (?ComputeWeightingMatrix@xclass@@$$FQAEXAAVconstellation@@D@Z) 错误LNK2001:无法解析的外部符号“ public:void __thiscall xclass :: ComputeWeightingMatrix(class星座和,char)”(?ComputeWeightingMatrix @ xclass @@ $$ FQAEXAAVconstellation @@ D @ Z)
After some discussion in Chat, it turns out there are two parts to the solution of this problem: 在“聊天”中进行了一些讨论之后,事实证明,解决此问题有两个部分:
class __declspec(dllexport) XClass
to ensure the functionality from the class is exported. class __declspec(dllexport) XClass
来确保从该类中导出功能。
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