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<a href="00865.html" target="topic">第十二章 随机约束</a>, <a href="00931.html" target="topic">主题</a></div>
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12.12 随机数系统函数与方法</div>
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<a href="00865.html" target="topic">第十二章 随机约束</a></p></div>
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描述 </div></td></tr><tr>
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<a href="00044.html" target="topic">12.12.1 $urandom</a> </div></td><td class="Element206" valign="top" width="50%">
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<span style="color: #0000FF">$urandom</span>系统函数提供了一种机制来产生伪随机数。每次调用这个函数的时候都会返回一个新的32位的随机数。这个随机数应该是无符号的。<br><br><span style="color: #0000FF">$urandom</span>的语法如下： </div></td></tr><tr>
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<a href="00045.html" target="topic">12.12.2 $urandom_range()</a> </div></td><td class="Element206" valign="top" width="50%">
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<span style="color: #0000FF">$urandom_range</span><span style="color: #800080">()</span>函数返回一个指定范围内的无符号整数。<br><br><span style="color: #0000FF">$urandom_range</span><span style="color: #800080">()</span>的语法如下： </div></td></tr><tr>
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<a href="00046.html" target="topic">12.12.3 srandom()</a> </div></td><td class="Element206" valign="top" width="50%">
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<span style="color: #0000FF">srandom</span><span style="color: #800080">()</span>方法允许我们手工地为对象或线程的随机数发生器（RNG）设置种子。一个进程的RNG可以使用进程的<span style="color: #0000FF">srandom</span><span style="color: #800080">()</span>方法来设置种子（参见<a href="00607.html" target="topic">9.9节</a>）。<br><br><span style="color: #0000FF">srandom</span><span style="color: #800080">()</span>方法的原型如下： </div></td></tr><tr>
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<a href="00047.html" target="topic">12.12.4 get_randstate()</a> </div></td><td class="Element206" valign="top" width="50%">
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<span style="color: #0000FF">get_randstate</span><span style="color: #800080">()</span>方法重新获得一个对象的随机数发生器（RNG）的当前状态。与一个进程相关联的RNG的状态可以使用进程的<span style="color: #0000FF">get_randstate</span><span style="color: #800080">()</span>方法重新获得（参见<a href="00607.html" target="topic">9.9节</a>）。<br><br><span style="color: #0000FF">get_randstate</span><span style="color: #800080">()</span>方法的原型如下： </div></td></tr><tr>
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<a href="00048.html" target="topic">12.12.5 set_randstate()</a> </div></td><td class="Element206" valign="top" width="50%">
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<span style="color: #0000FF">set_randstate</span><span style="color: #800080">()</span>方法设置一个对象的随机数发生器（RNG）的状态。与一个进程相关联的RNG的状态使用进程的<span style="color: #0000FF">set_randstate</span><span style="color: #800080">()</span>方法来设置（参见<a href="00607.html" target="topic">9.9节</a>）。<br><br><span style="color: #0000FF">set_randstate</span><span style="color: #800080">()</span>方法的原型如下： </div></td></tr></table></div></div>
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<a href="00865.html" target="topic">第十二章 随机约束</a>, <a href="00931.html" target="topic">主题</a></div>
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