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2021年1月编译原理考题汇总.html
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2021年1月编译原理考题汇总
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<h2 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h2><p>在编译原理的复习过程中，参考了许多前辈总结的考题，获益匪浅，在此向他们表示感谢。趁现在对考题仍有几分记忆，做下记录，希望帮助到学弟学妹们。</p>
<h2 id="考试题型"><a href="#考试题型" class="headerlink" title="考试题型"></a>考试题型</h2><p>考试题型近几年都较为固定，分为以下几种：</p>
<p><img src="https://charfole-blog.oss-cn-shenzhen.aliyuncs.com/image/image-20210214162929530.png" alt="image-20210214162929530"></p>
<a id="more"></a>
<h2 id="2021年1月试题汇总"><a href="#2021年1月试题汇总" class="headerlink" title="2021年1月试题汇总"></a>2021年1月试题汇总</h2><h3 id="一、基础知识题"><a href="#一、基础知识题" class="headerlink" title="一、基础知识题"></a>一、基础知识题</h3><p>判断该正则表达式文法是否正确？如不正确应该如何进行改写？</p>
<script type="math/tex; mode=display">S->RE| RE"|" RF | RE·RF |(RE)|RE^*|RE^+</script><h3 id="二、正则表达式-gt-DFA分析题"><a href="#二、正则表达式-gt-DFA分析题" class="headerlink" title="二、正则表达式->DFA分析题"></a>二、正则表达式->DFA分析题</h3><p>请画出 C++ 语言中单词的DFA图，并写出对应的词法分析程序。</p>
<h3 id="三、自顶向下分析设计题"><a href="#三、自顶向下分析设计题" class="headerlink" title="三、自顶向下分析设计题"></a>三、自顶向下分析设计题</h3><p>请写出 C 语言中 if-else 语句的文法，并用语法树为其生成四元组，写出该语法树的程序。</p>
<h3 id="四、LR分析题"><a href="#四、LR分析题" class="headerlink" title="四、LR分析题"></a>四、LR分析题</h3><p>写出判断一个文法是否为 SLR(1) 文法的程序。</p>
<h3 id="五、语义分析题"><a href="#五、语义分析题" class="headerlink" title="五、语义分析题"></a>五、语义分析题</h3><p>小明发明了一种新的类型声明语句，形式如下，请你写出其对应的文法及语义分析程序。</p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">i:<span class="keyword">float</span></span><br><span class="line">i,j,k:<span class="keyword">int</span></span><br></pre></td></tr></table></figure>
<h3 id="六、综合分析设计题-矩阵连乘"><a href="#六、综合分析设计题-矩阵连乘" class="headerlink" title="六、综合分析设计题 (矩阵连乘)"></a>六、综合分析设计题 (矩阵连乘)</h3><p>当有多个矩阵进行运算时，各个矩阵之间的运算顺序可影响到最终的运算次数。如 A 为 50×20 的矩阵，B为 20×5 的矩阵，C为 5×30 的矩阵，那么 (AB)C 的运算次数为12500次，A(BC) 的运算次数为33000次，下面请你用编译原理的方法完成这一类式子的计算和判别功能，写出相关的思路和代码，要求的输入输出格式如下：</p>
<p><strong>注意：不用编译原理相关的方法最多得3分！！</strong></p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">Input:</span><br><span class="line">(ABC</span><br><span class="line">(AB)C</span><br><span class="line">A(BC)</span><br><span class="line"></span><br><span class="line">Output:</span><br><span class="line">No</span><br><span class="line">12500</span><br><span class="line">33000</span><br></pre></td></tr></table></figure>
<h2 id="写在后面"><a href="#写在后面" class="headerlink" title="写在后面"></a>写在后面</h2><p>本次汇总是根据回忆所写出来的，因此难免有疏漏或错误。如各位在观看时对汇总的题目有不解，或是发现了错误，请通过我的邮箱<strong>mail#charfole.top(#换成@)</strong>联系我，感谢！</p>
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