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POC++ inner classes not compiling
 

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  1. POC++ inner classes not compiling
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    <p>I have a Class called Song with Inner class Creator . Below is the Song.h File. Please ignore the comments.</p> <pre><code>#ifndef SONG_H #define SONG_H #include &lt;iostream&gt; class Song { public: class Creator{ public: //Creator&amp; name(const std::string name){}; void name(const std::string name){}; //std::string getName(){}; }; private: std::string mName; }; #endif // SONG_H </code></pre> <p>and here is Song.cpp class</p> <pre><code>#include "Song.h" using std::string; //using Song::Creator; //Song::Creator&amp; Song::Creator::name(const string name) void Song::Creator::name(const string name) { mName=name; std::cout&lt;&lt;name; //return *this; } //string Creator::getName() //{ //return mName; //} </code></pre> <p>and the main class</p> <pre><code>#include &lt;iostream&gt; #include "Song.h" int main() { Song::Creator sc; sc.name("vickey"); //std::cout&lt;&lt;sc.getName(); return 0; } </code></pre> <p>On compilation it throws </p> <pre><code>/home/vickey/qtprojects/innerClass-build-desktop-Desktop_Qt_4_8_0_for_GCC__Qt_SDK__Release/../innerClass/Song.cpp:6: error: redefinition of 'void Song::Creator::name(std::string)' </code></pre> <p>and if I change the name function to </p> <pre><code>void Creator::name(const string name) { mName=name; std::cout&lt;&lt;name; //return *this; } </code></pre> <p>I get this error</p> <pre><code>/home/vickey/qtprojects/innerClass-build-desktop-Desktop_Qt_4_8_0_for_GCC__Qt_SDK__Release/../innerClass/Song.cpp:6: error: 'Creator' has not been declared </code></pre> <p>what is that I m doing wrong ? Thanks in advance.</p>
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    1. USVihaan Verma
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    1. COStyle advice: short names like `SONG_H` are prone to collide some day, and from experience, header-guard clashes are mighty confusing. Personally, I do `<NAME_OF_FILE_DATETIME>`, e.g. `#ifndef SONG_H_20120330`. Because time is not reversible, this only clashes if you have multiple files of the same name at the same day (in that case, you write `SONG_20120330a` or `SONG_20120330_1959`)
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      1. POC++ inner classes not compiling
      1. USSebastian Mach
    2. COthanks I will keep that in mind
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      1. POC++ inner classes not compiling
      1. USVihaan Verma
 

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