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📁 清华教材后面的pl0程序
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mso-hansi-font-family:"Times New Roman"'>编译程序自动调用解释执行程序，对目标代码进行解释执行，并按用户程序的要求输入数据和输出运行结果。</span></p>

<p class=MsoNormal align=center style='text-align:center;text-indent:21.0pt'><span
lang=EN-US><!--[if gte vml 1]><v:shape id="_x0000_i1025" type="#_x0000_t75"
 style='width:415.5pt;height:198pt' o:ole="">
 <v:imagedata src="./PL.files/image015.png" o:title=""/>
</v:shape><![endif]--><![if !vml]><img width=554 height=264
src="./PL.files/image016.jpg" v:shapes="_x0000_i1025"><![endif]><!--[if gte mso 9]><xml>
 <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1025"
  DrawAspect="Content" ObjectID="_1101490853">
 </o:OLEObject>
</xml><![endif]--></span></p>

<p class=MsoNormal style='text-indent:21.0pt'><span lang=EN-US>PL/0</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语言使用</span><span lang=EN-US>PASCAL</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语言书写的，整个编译程序（包含主程序）是由</span><span lang=EN-US>18</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>个嵌套机并列的过程或函数组成。</span></p>

<p class=MsoNormal style='text-indent:21.0pt'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>函数功能说明表：</span></p>

<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
 border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0cm 5.4pt 0cm 5.4pt'>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border-top:solid windowtext .5pt;
  border-left:none;border-bottom:solid windowtext .5pt;border-right:none;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:solid windowtext .5pt;
  border-left:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal align=center style='text-align:center'><span
  style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>过程或函数名</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border-top:solid windowtext .5pt;
  border-left:none;border-bottom:solid windowtext .5pt;border-right:none;
  mso-border-left-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal align=center style='text-align:center'><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:solid windowtext .5pt;
  border-left:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal align=center style='text-align:center'><span
  style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>功能简要说明</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;mso-border-top-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>p10</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-top-alt:
  solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>主程序</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>error</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>出错处理，打印出错位置和错误编码</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>getsym</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>词法分析，读取一个单词</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>getch</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>漏掉空格，读取一个字符</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>gen</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>生成目标代码，并送入目标程序区</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>test</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>测试当前单词符是否合法</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>block</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>分析程序处理过程</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>enter</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>登录名字表</span></p>
  </td>
 </tr>
 <tr>
  <td width=17 valign=top style='width:13.1pt;border:none;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=119 valign=top style='width:89.15pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span lang=EN-US>position(</span><span style='font-family:
  宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>函数</span><span
  lang=EN-US>)</span></p>
  </td>
  <td width=27 valign=top style='width:20.15pt;border:none;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><span
  lang=EN-US><o:p></o:p></span></p>
  </td>
  <td width=405 valign=top style='width:303.7pt;border:none;border-right:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>查找标识符在名字表中的位置</span></p>
  </td>
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