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    <p>Unless you prefix it with a slash (on unix) or a drive path (Windows), QFile's constructor parameter is a <em>relative path</em> - relative to the current working directory. score.txt is created in the build/ directory because that's probably where you're executing the binary from.</p> <p>You can't store score.txt in the /usr/bin directory because, typically, you can't write there without root privileges. </p> <p>What you want to do is get a path to some directory where you can store your score.txt file. To do that, you can use the <code>QDesktopServices</code> class. That will give you directory information on a per-user basis. Here's an example:</p> <pre><code>#include &lt;QDesktopServices&gt; // this would go in main(), probably QCoreApplication::setApplicationName( "word jumble game" ); // now when you want to read/write the scores file: QString dataPath = QDesktopService::storageLocation( QDesktopService::DataLocation ); QFile scoreFile( dataPath + "score.txt" ); // on my system, this produces: "/home/adam/.local/share/data/word jumble game/score.txt" // it will produce something similar for Windows and Mac too </code></pre> <p>You should set your appication name via <code>QCoreApplication::setApplicationName</code> before getting path information to keep the user data directory nice and organised.</p> <p>As for getting your application in the games list, you'll need to create a menu entry that follows the freedesktop.org spec. <strike>I can't help you more with that, but <a href="http://standards.freedesktop.org/menu-spec/latest/" rel="nofollow">this</a> is a good starting point. Somebody else might have more info for you.</strike></p> <p>You need to create a .desktop entry file and install it using <code>xdg-desktop-menu install</code>. Here are two resources for you: <a href="http://standards.freedesktop.org/menu-spec/latest/" rel="nofollow">freedesktop.org menu spec</a> and <a href="http://www.cmake.org/pipermail/cmake/2010-September/039413.html" rel="nofollow">adding .desktop files using CMake</a></p>
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    1. COThanks Adam it helped.
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