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POLNK2005 and LNK1169 on debug objects
 

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  1. POLNK2005 and LNK1169 on debug objects
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    <p>I have read about these two errors pretty extensively but despite all of my efforts I can not see the problem here. I have absolutely flooded my code with header guards to see if that will help, with no change in the result. here are each of the files: <strong>Mystring.cpp</strong></p> <pre><code>#pragma once #include "MyString.h" #ifndef MYSTRING_CPP #define MYSTRING_CPP using namespace std; MyString::MyString(char chars[]){ str = (char*) malloc(strlen(chars)); str = chars; } //etc, other methods as defined in header file #endif </code></pre> <p><strong>Mystring.h</strong></p> <pre><code>#pragma once #include &lt;string.h&gt; #include &lt;iostream&gt; #ifndef MYSTRING_H #define MYSTRING_H using namespace std; class MyString { protected: char * str; public: ~MyString(); MyString(char chars[]); MyString(const char chars[]); MyString(); int length(); void resize(int n, char c); void clear(); bool empty(); void insert(int pos1, const MyString&amp; str); void insert (int pos1, const char* s); void erase (int pos, int n); int find(const MyString&amp; str); int find(const char* s); int compare(const MyString&amp; str); int compare(const char* s); const char* getStr() const; MyString::MyString(const MyString &amp;that); MyString &amp; operator=(const char chars[]); MyString &amp; operator=(const MyString&amp; str); }; #endif </code></pre> <p><strong>MystringDerived.h</strong></p> <pre><code>#pragma once #include "MyString.cpp" #ifndef MYSTRINGDERIVED_H #define MYSTRINGDERIVED_H class MyStringDerived : public MyString { public: MyStringDerived(char chars[]); bool operator&gt;(MyString rhs); bool operator&gt;=(MyString rhs); bool operator&lt;(MyString rhs); bool operator&lt;=(MyString rhs); bool operator==(MyString rhs); bool operator!=(MyString rhs); bool operator+(MyString rhs); bool operator[](MyString rhs); MyStringDerived(void); ~MyStringDerived(void); }; #endif </code></pre> <p><strong>MyStringDerived.cpp</strong></p> <pre><code> #pragma once #include "MyStringDerived.h" #ifndef MYSTRINGDERIVED_CPP #define MYSTRINGDERIVED_CPP MyStringDerived::MyStringDerived(char * const) { } MyStringDerived::~MyStringDerived(void) { } #endif </code></pre> <p>and the errors I get</p> <pre><code> 1&gt;test.obj : error LNK2005: "public: int __thiscall MyString::length(void)" (?length@MyString@@QAEHXZ) already defined in MyString.obj 1&gt;test.obj : error LNK2005: "public: void __thiscall MyString::resize(int,char)" (?resize@MyString@@QAEXHD@Z) already defined in MyString.obj 1&gt;C:\Users\Arthur\Documents\Visual Studio 2012\Projects\Project1\Debug\Project2.exe : fatal error LNK1169: one or more multiply defined symbols found </code></pre> <p>There are hundreds of error lines that all look like this. With the way I organized my includes, I definitely don't see how I might be ending up with multiple copies being included. Is there something else I'm missing? Any insights are appreciated. This is homework (obviously), so I definitely want to actually understand the problem when I'm done here. No one I've shown it to has caught what i'm doing wrong.</p> <p>Thanks!</p> <p>Forgot to include test.cpp. it's as simple as this at the moment :</p> <blockquote> <p>MyStringDerived m = "test"; cout&lt;&lt; m.getStr(); getchar(); return 0;</p> </blockquote>
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