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📁 pl/0编译程序的java版
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PL0
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  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;<A HREF="#field_summary">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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<H2>
Class PL0</H2>
<PRE>
java.lang.Object
  <IMG SRC="./resources/inherit.gif" ALT="extended by "><B>PL0</B>
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<DL>
<DT><PRE>public class <B>PL0</B><DT>extends java.lang.Object</DL>
</PRE>

<P>
<p>这个版本的 PL/0 编译器根据 C 语言的版本改写而成。两个版本在基本逻辑上是一致的,有些地方可能有所改动,例如getsym()和statement()两个函数,另外请注意C语言版本中的全局变量绝大部分分散到编译器各个构成部件中,为便于查找,保留了原来的名字。</p><p>阅读过程中若有疑问请及时咨询你的助教。</p>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#al">al</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#amax">amax</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#cxmax">cxmax</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.io.PrintStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#fa">fa</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;java.io.PrintStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#fa1">fa1</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.io.PrintStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#fa2">fa2</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;java.io.PrintStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#fas">fas</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;<A HREF="Interpreter.html" title="class in &lt;Unnamed&gt;">Interpreter</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#interp">interp</A></B></CODE>

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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#levmax">levmax</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;<A HREF="Scanner.html" title="class in &lt;Unnamed&gt;">Scanner</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#lex">lex</A></B></CODE>

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<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#listswitch">listswitch</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#nmax">nmax</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#norw">norw</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="Parser.html" title="class in &lt;Unnamed&gt;">Parser</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#parser">parser</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;<A HREF="Table.html" title="class in &lt;Unnamed&gt;">Table</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#table">table</A></B></CODE>

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<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#tableswitch">tableswitch</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#txmax">txmax</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<TD><CODE><B><A HREF="PL0.html#PL0(java.io.BufferedReader)">PL0</A></B>(java.io.BufferedReader&nbsp;fin)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;构造函数,初始化编译器所有组成部分</TD>
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<CODE>(package private) &nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#compile()">compile</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;执行编译动作</TD>
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<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="PL0.html#main(java.lang.String[])">main</A></B>(java.lang.String[]&nbsp;args)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;主函数</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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