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POLNK 2019 unresolved external symbol...again
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  1. POLNK 2019 unresolved external symbol...again
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    copied!<p>So I've read most post down here regarding this error, I'm still unable to understand the cause of my error. The project consists of 2 header files along with cpp implementations + main cpp file. </p> <p>DbApi.h contains definitions for functions implemented in DbApi.cpp. Linker.h contains definitions for functions called by Source.cpp, while Linker.cpp contains their implementations, which are calling functions from DbApi.h </p> <p>Linker.h</p> <pre><code>#ifndef LINKER_DEFINED #define LINKER_DEFINED #include "DbAPI.h" enum Short_Result_Code{...}; Short_Result_Code createNewCategory(string name, list &lt;int&gt; &amp;Parents); #endif </code></pre> <p>Linker.cpp</p> <pre><code>#include "Linker.h" Short_Result_Code createNewCategory(string name, list &lt;int&gt; &amp;Parents) { int RC = db::addCategory(name, Parents); if(RC==0) return OK; else return ERROR; } </code></pre> <p>DbApi.h</p> <pre><code>#ifndef __dbAPI_H_INCLUDED #define __dbAPI_H_INCLUDED namespace db { int addCategory(string name, list &lt;int&gt; parents); } #endif </code></pre> <p>DbApi.cpp</p> <pre><code>#include "DbAPI.h" namespace db { int addCategory(string name, list &lt;int&gt; parents) { // implementation }; } </code></pre> <p>main.cpp</p> <pre><code>#include "Linker.h" int main { list&lt;int&gt; A; A.push_back(1); A.push_back(2); string d = "ABC"; createNewCategory(d, A); } </code></pre> <ul> <li><p>error:</p> <p>error LNK2019: unresolved external symbol "enum Short_Result_Code __cdecl createNewCategory(class std::basic_string,class std::allocator >,class std::list > &amp;)" (?createNewCategory@@YA?AW4Short_Result_Code@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AAV?$list@HV?$allocator@H@std@@@3@@Z) referenced in function _main F:\AeroFS\Work\ETI\PDFAccess\PDFAccess\Source.obj PDFAccess</p></li> </ul> <p>Where am I getting this wrong?</p>
 

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