无法从dll调用函数

Question

问题是我的编译器无法从dll文件解析函数

这是我的图书馆代码

#ifndef DLL_SAMPLE
#define DLL_SAMPLE

#include <iostream>

class A
{
public:
    static void a();
};

#endif

#include "DllSample.h"

void A::a()
{
    std::cout << "hello, world" << std::endl; 
}

我的源代码

#include "DllSample.h"

int main(int argc, char* argv[])
{
    A::a();
    return 0;
}

我将其配置为

如果我将函数内联到头文件中，它将起作用，但是当我这样做时，上面的构建将失败。

消息是：

1>    main.obj : error LNK2019: unresolved external symbol "public: static void __cdecl A::a(void)" (?a@A@@SAXXZ) referenced in function _main
1>    D:\Home\Document\Visual Studio 2019 Projects\ErrorShot\Debug\CallDllFunctionSample.exe : fatal error LNK1120: 1 unresolved externals
1>    The command exited with code 1120.
1>  Done executing task "Link" -- FAILED.
1>Done building target "Link" in project "CallDllFunctionSample.vcxproj" -- FAILED.
1>
1>Done building project "CallDllFunctionSample.vcxproj" -- FAILED.
1>
1>Build FAILED.
1>
1>main.obj : error LNK2019: unresolved external symbol "public: static void __cdecl A::a(void)" (?a@A@@SAXXZ) referenced in function _main
1>D:\Home\Document\Visual Studio 2019 Projects\ErrorShot\Debug\CallDllFunctionSample.exe : fatal error LNK1120: 1 unresolved externals
1>    0 Warning(s)
1>    2 Error(s)

Answer 1