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POLNK2019: unresolved external symbol but I have coded the function
 

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  1. POLNK2019: unresolved external symbol but I have coded the function
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    <p>Can somebody help me with this? I'm using Visual Studio 2010 I'm getting this message and I don't know how to solve this.</p> <blockquote> <p>1> Generating Code...</p> <p>1>dct.obj : error LNK2019: unresolved external symbol "public: __thiscall Amostras::Amostras(class std::basic_string,class std::allocator >)" (??0Amostras@@QAE@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function _main</p> <p>1>C:\Users\redneck\documents\visual studio 2010\Projects\dct\Debug\dct.exe : fatal error LNK1120: 1 unresolved externals</p> </blockquote> <p>Here is some of the *.cpp file:</p> <pre><code>class Amostras { public: int original[10][257]; int idct[10][257]; float dct[10][257]; int grupos; Amostras::Amostras(void) { for (int i=0;i&lt;10;i++) { this-&gt;original[i][0]=0; this-&gt;dct[i][0]=0.0; this-&gt;idct[i][0]=0; } this-&gt;grupos=0; } Amostras::Amostras(string arquivo) { int n_samples=0,linha=0,coluna=0; int cont; .. </code></pre> <p>and here is the *.h</p> <pre><code>class Amostras { public: int original[10][257]; int idct[10][257]; float dct[10][257]; int grupos; Amostras::Amostras(); Amostras::Amostras(string arquivo); void Amostras::mostra(void); }; </code></pre> <p>main</p> <pre><code>int main(void) { Amostras *amostra = new Amostras("in.txt"); dct(amostra,0); show(amostra,0); amostra-&gt;mostra(); return 0; } </code></pre> <p>hope it helps, i'm running out of options here :(</p> <hr> <p>Solution:</p> <p>So what I did was just putting the class just in *.h and then including the *.h in the class *.cpp that only has the methods and functions of that class. It worked!</p>
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    1. COSee templatetypedef's answer, but if you want a more specific answer then post your code. In the meantime you can read this for more information on LNK2019: http://msdn.microsoft.com/en-us/library/799kze2z(v=vs.80).aspx
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      1. POLNK2019: unresolved external symbol but I have coded the function
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