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POunpredictable runtime behavior while converting QString to const char*
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  1. POunpredictable runtime behavior while converting QString to const char*
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    copied!<p>I have these following codes set up-</p> <pre><code>class ID3{ const char* fileName; TagLib::FileRef *file; public: ID3(const char *); QImage* artwork(); } ID3::ID3(const char* fileNameStr){ this-&gt;fileName = fileNameStr; this-&gt;file = new TagLib::FileRef(fileNameStr); qDebug()&lt;&lt;fileNameStr; //OUTPUT 2 } QImage* ID3::artwork(){ QString str = QString::fromLocal8Bit(this-&gt;fileName); qDebug()&lt;&lt;str; //OUTPUT 3 //MORE CODES------- } const char * QstrTocChar(QString str){ QByteArray ba = str.toLocal8Bit(); qDebug()&lt;&lt;ba.constData(); //OUTPUT 1 return ba.constData(); } int main(int argc, char *argv[]){ . . . QString fileName = "C:/Qt/Qt5.0.2/Projects/taglib_test/music files/Muse_-_Madness.mp3"; file = new ID3(QstrTocChar(fileName)); QImage *image = file-&gt;artwork(); } </code></pre> <p>Now when I run the program, I get these strange outputs</p> <p><strong>OUTPUT 1</strong></p> <pre><code>C:/Qt/Qt5.0.2/Projects/taglib_test/music files/Muse_-_Madness.mp3 </code></pre> <p><strong>OUTPUT 2</strong></p> <pre><code>????p???e'2/ </code></pre> <p><strong>OUTPUT 3</strong></p> <pre><code>"°í³àpµ˜Æe'2/" </code></pre> <p>Not sure about <strong>OUTPUT 2</strong> but I expect OUTPUT 3 to be same as <strong>OUTPUT 1</strong>. I am a Qt newbie. Would really appreciate advice/help in understanding, these strange character encoding issues and how to get <strong>OUTPUT 3</strong> fixed.</p> <p>Thanks!</p>
 

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