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POC++ Constructor inheritance not working correctly
 

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  1. POC++ Constructor inheritance not working correctly
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    <p>This is the dependent class header</p> <pre><code>#ifndef TransHeader #define TransHeader #include &lt;string&gt; #include "CipherHeader.h" using namespace std; class Trans : public Cipher { public: Trans(string filenameIn); const static int MAXSIZE = 10000; void createArray(); void transEncrypt(); void transDecrypt(); private: //string Key; //string inputData; char dataArray[MAXSIZE][MAXSIZE]; }; #endif </code></pre> <p>This is the inherited header</p> <pre><code>#ifndef CipherHeader #define CipherHeader #include &lt;string&gt; using namespace std; class Cipher { public: const static int MAXSIZE = 10000; Cipher(string filenameIn); void getKey(); void flagHandle(string); string Key; string inputData; string filename; string flags; string readFile(); void writeFile(); private: }; #endif </code></pre> <p>The problem is after I call the base constructor</p> <pre><code>Trans::Trans(string filenameIn) : Cipher(filenameIn) {} </code></pre> <p>I cannot call the constructor in a normal file like so:</p> <pre><code>#include "Trans.cpp" int main() { string a = "asdf"; Trans *c = new Trans(a); } </code></pre> <p>This results in this error:</p> <pre><code>g++ test.cpp -o test.out /tmp/ccbuqMYr.o: In function `Trans::Trans(std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;)': test.cpp:(.text+0x35): undefined reference to `Cipher::Cipher(std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;)' /tmp/ccbuqMYr.o: In function `Trans::Trans(std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;)': test.cpp:(.text+0xa5): undefined reference to `Cipher::Cipher(std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;)' collect2: ld returned 1 exit status </code></pre> <p>replacing Trans with Cipher works just fine and runs. I have tried everything I know, googled excessively, and cannot figure out this error. Other design problems, ect will be dealt with later, this is my main problem. Please help.</p> <p>EDIT:: definition of Cipher</p> <pre><code>Cipher::Cipher(string filenameIn) { filename = filenameIn; readFile(); getKey(); } </code></pre>
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    1. USAdam Wenger
    1. USJack Satriano
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      1. VTDownMod
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    1. COThis is a linker error. You have either missed the definition of `Cipher::Cipher()` or the `.cpp` file where this definition resides.
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      1. USiammilind
    2. COVery late response, but if I remember correctly, this guy solved my problems.
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      1. USJack Satriano
 

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