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POerror LNK2010 in visual c, cannot call method in other project file
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  1. POerror LNK2010 in visual c, cannot call method in other project file
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    copied!<blockquote> <p>error LNK2019: unresolved external symbol "char * __cdecl BytesToString(unsigned char const *,unsigned int)" (?BytesToString@@YAPADPBEI@Z) referenced in function _wmain C:\Users\anandada\Documents\Visual Studio 2010\Projects\ByteToString\ByteToString\ByteToString.obj ByteToString</p> </blockquote> <p>above is the error I am getting. code is shown below. ByteToString is a console Win32 application and Utility is Win32 DLL.</p> <blockquote> <p>Utility.c</p> </blockquote> <pre><code>#include "stdafx.h" #include "Utility.h" #include "stdlib.h" char* BytesToString( const unsigned char* PpcbBytes, const unsigned int PuiNoOfBytes) { unsigned char bRetVal = 0; unsigned int ctr = 0; char* PpszString = NULL; int len=0; do { PpszString=(char*)calloc(PuiNoOfBytes*3+1,sizeof(char)); if(NULL==PpszString) break; len=5; } while(0); return PpszString; } </code></pre> <blockquote> <p>Utility.h</p> </blockquote> <pre><code>#ifndef _UTILITY_H #define _UTILITY_H __declspec(dllexport) char* BytesToString( const unsigned char* PpcbBytes, const unsigned int PuiNoOfBytes); #endif </code></pre> <blockquote> <p>ByteToString.cpp</p> </blockquote> <pre><code>// ByteToString.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include "string.h" #include "stdlib.h" #include "..\Utility\Utility.h" int _tmain(int argc, _TCHAR* argv[]) { unsigned char pbArray[5]={0x41,0x42,0x43,0x44,0x45}; char* pbExpArray=NULL; unsigned int Flag=1; int len=0; pbExpArray=BytesToString(pbArray,5); free(pbExpArray); Flag=strcmp("41 42 43 44 45 ",pbExpArray); len=strlen(pbExpArray); return 0; } </code></pre> <p>I have set project properties like this:</p> <p>both ByteToString and Utility project calling conventions are: __cdecl</p> <p>In ByteToString, Linker->General->Additional Directories: $(OutDir)</p> <p>(I tried this too Linker->General->Additional Directories:$(SolutionDir)$(Configuration)\ )</p> <p>In ByteToString, Linker->Input->Additional Dependenicies: Utility.lib</p> <p>I aslo tried this,</p> <pre><code>#ifndef _UTILITY_H #define _UTILITY_H extern "C" { __declspec(dllexport) char* BytesToString( const unsigned char* PpcbBytes, const unsigned int PuiNoOfBytes); } #endif </code></pre> <p>This gives error:</p> <blockquote> <p>error C2059: syntax error : 'string'</p> </blockquote> <p>Update:</p> <ol> <li>While creating project, I had added <strong>Utility.cpp</strong>. I renamed it to <strong>Utility.c</strong>, set the project properties and compiled. I got the error shown above. </li> <li>Then I renamed it back to <strong>Utility.cpp</strong> and compiled. No error.</li> </ol> <p>Why is this? I want <strong>Utility</strong> file in <strong>.c</strong>. What is the correct method to add a <strong>.c</strong> file into project?</p>
 

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