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<td >Qt 5.12</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-module.html">C++ Classes</a></td><td >QRandomGenerator64</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtcore-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QRandomGenerator64 Class</h1>
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<p>The <a href="qrandomgenerator64.html">QRandomGenerator64</a> class allows one to obtain 64-bit random values from a high-quality, seed-less Random Number Generator. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QRandomGenerator64></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += core</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.10</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qrandomgenerator.html">QRandomGenerator</a></td></tr></table></div><ul>
<li><a href="qrandomgenerator64-members.html">List of all members, including inherited members</a></li>
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<h2 id="public-types">Public Types</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> typedef </td><td class="memItemRight bottomAlign"><b><a href="qrandomgenerator64.html#result_type-typedef">result_type</a></b></td></tr>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> quint64 </td><td class="memItemRight bottomAlign"><b><a href="qrandomgenerator64.html#generate">generate</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QRandomGenerator64::result_type </td><td class="memItemRight bottomAlign"><b><a href="qrandomgenerator64.html#operator-28-29">operator()</a></b>()</td></tr>
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<li class="fn">16 public functions inherited from <a href="qrandomgenerator.html#public-functions">QRandomGenerator</a></li>
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<h3>Additional Inherited Members</h3>
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<li class="fn">5 static public members inherited from <a href="qrandomgenerator.html#static-public-members">QRandomGenerator</a></li>
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qrandomgenerator64.html">QRandomGenerator64</a> class allows one to obtain 64-bit random values from a high-quality, seed-less Random Number Generator.</p>
<p><a href="qrandomgenerator64.html">QRandomGenerator64</a> is a simple adaptor class around <a href="qrandomgenerator.html">QRandomGenerator</a>, making the <a href="qrandomgenerator.html#generate64">QRandomGenerator::generate64</a>() function the default for <a href="qrandomgenerator64.html#operator-28-29">operator</a>()(), instead of the function that returns 32-bit quantities. This class is intended to be used in conjunction with Standard Library algorithms that need 64-bit quantities instead of 32-bit ones.</p>
<p>In all other aspects, the class is the same. Please refer to <a href="qrandomgenerator.html">QRandomGenerator</a>'s documentation for more information.</p>
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<p><b>See also </b><a href="qrandomgenerator.html">QRandomGenerator</a>.</p>
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<h2>Member Type Documentation</h2>
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<h3 class="fn" id="result_type-typedef"><a name="result_type-typedef"></a>typedef QRandomGenerator64::<span class="name">result_type</span></h3>
<p>A typedef to the type that <a href="qrandomgenerator64.html#operator-28-29">operator</a>() returns. That is, quint64.</p>
<p><b>See also </b><a href="qrandomgenerator64.html#operator-28-29">operator</a>().</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="generate"><a name="generate"></a><span class="type"><a href="qtglobal.html#quint64-typedef">quint64</a></span> QRandomGenerator64::<span class="name">generate</span>()</h3>
<p>Generates one 64-bit random value and returns it.</p>
<p>Note about casting to a signed integer: all bits returned by this function are random, so there's a 50% chance that the most significant bit will be set. If you wish to cast the returned value to qint64 and keep it positive, you should mask the sign bit off:</p>
<pre class="cpp">
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> value <span class="operator">=</span> QRandomGenerator64<span class="operator">::</span>generate() <span class="operator">&</span> std<span class="operator">::</span>numeric_limits<span class="operator"><</span><span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">></span><span class="operator">::</span>max();
</pre>
<p><b>See also </b><a href="qrandomgenerator.html">QRandomGenerator</a> and <a href="qrandomgenerator.html#generate64">QRandomGenerator::generate64</a>().</p>
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<h3 class="fn" id="operator-28-29"><a name="operator-28-29"></a><span class="type"><a href="qrandomgenerator64.html#result_type-typedef">QRandomGenerator64::result_type</a></span> QRandomGenerator64::<span class="name">operator()</span>()</h3>
<p>Generates a 64-bit random quantity and returns it.</p>
<p><b>See also </b><a href="qrandomgenerator.html#generate">QRandomGenerator::generate</a>() and <a href="qrandomgenerator.html#generate64">QRandomGenerator::generate64</a>().</p>
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