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pl/0编译程序的java版

<B>Field Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="ch"><!-- --></A><H3>
ch</H3>
<PRE>
private char <B>ch</B></PRE>
<DL>
<DD>刚刚读入的字符
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="line"><!-- --></A><H3>
line</H3>
<PRE>
private char[] <B>line</B></PRE>
<DL>
<DD>当前读入的行
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="ll"><!-- --></A><H3>
ll</H3>
<PRE>
public int <B>ll</B></PRE>
<DL>
<DD>当前行的长度（line length）
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="cc"><!-- --></A><H3>
cc</H3>
<PRE>
public int <B>cc</B></PRE>
<DL>
<DD>当前字符在当前行中的位置（character counter）
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="sym"><!-- --></A><H3>
sym</H3>
<PRE>
public <A HREF="Symbol.html" title="class in &lt;Unnamed&gt;">Symbol</A> <B>sym</B></PRE>
<DL>
<DD>当前读入的符号
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="word"><!-- --></A><H3>
word</H3>
<PRE>
private java.lang.String[] <B>word</B></PRE>
<DL>
<DD>保留字列表（注意保留字的存放顺序）
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="wsym"><!-- --></A><H3>
wsym</H3>
<PRE>
private int[] <B>wsym</B></PRE>
<DL>
<DD>保留字对应的符号值
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="ssym"><!-- --></A><H3>
ssym</H3>
<PRE>
private int[] <B>ssym</B></PRE>
<DL>
<DD>单字符的符号值
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="in"><!-- --></A><H3>
in</H3>
<PRE>
private java.io.BufferedReader <B>in</B></PRE>
<DL>
<DL>
</DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<B>Constructor Detail</B></FONT></TH>
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<A NAME="Scanner(java.io.BufferedReader)"><!-- --></A><H3>
Scanner</H3>
<PRE>
public <B>Scanner</B>(java.io.BufferedReader&nbsp;input)</PRE>
<DL>
<DD>初始化词法分析器
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>input</CODE> - PL/0 源文件输入流</DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
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<B>Method Detail</B></FONT></TH>
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<A NAME="getch()"><!-- --></A><H3>
getch</H3>
<PRE>
void <B>getch</B>()</PRE>
<DL>
<DD>读取一个字符，为减少磁盘I/O次数，每次读取一行
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getsym()"><!-- --></A><H3>
getsym</H3>
<PRE>
public void <B>getsym</B>()</PRE>
<DL>
<DD>词法分析，获取一个词法符号，是词法分析器的重点
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="matchKeywordOrIdentifier()"><!-- --></A><H3>
matchKeywordOrIdentifier</H3>
<PRE>
void <B>matchKeywordOrIdentifier</B>()</PRE>
<DL>
<DD>分析关键字或者一般标识符
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="matchNumber()"><!-- --></A><H3>
matchNumber</H3>
<PRE>
void <B>matchNumber</B>()</PRE>
<DL>
<DD>分析数字
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="matchOperator()"><!-- --></A><H3>
matchOperator</H3>
<PRE>
void <B>matchOperator</B>()</PRE>
<DL>
<DD>分析操作符
<P>
<DD><DL>
</DL>
</DD>
</DL>
<!-- ========= END OF CLASS DATA ========= -->
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