1、(3)接受acc: 当归约到文法符号栈中只剩文法的开始符号S时,并且输入符号串已结束即当前输入符是#,则为分析成功。(4)报错:当遇到状态栈顶为某一状态下出现不该遇到的文法符号时,则报错,说明输入端不是该文法能接受的符号串。四、实验要求1、编程时注意编程风格:空行的使用、注释的使用、缩进的使用等。2、如果遇到错误的表达式,应输出错误提示信息。3、程序输入/输出实例:输入一以#结束的符号串(包括+*/()i#):在此位置输入符号串 输出过程如下:步骤 状态栈 符号栈 剩余输入串 动 作 1 0 # i+i*i# 移进i+i*i的LR分析过程步骤状态栈符号栈输入串动作说明1#i+i*i#ACTIO
2、N0,i=S5,状态5入栈05#i+i*i#r6: Fi归约,GOTO(0,F)=3入栈303#Fr4: TF归约,GOTO(0,T)=3入栈402#Tr2: ET归约,GOTO(0,E)=1入栈501#EACTION1,+=S6,状态6入栈6016#E+i*i#ACTION6,i=S5,状态5入栈70165#E+i*i# Fi归约,GOTO(6,F)=3入栈80163#E+F TF归约,GOTO(6,T)=9入栈90169#E+TACTION9,*=S7,状态7入栈1001697#E+T*i#ACTION7,i=S5,状态5入栈11016975#E+T*iFi归约,GOTO(7,F)=10入
3、栈120169710#E+T*Fr3: TT*F归约,GOTO(6,T)=9入栈13r1:EE+T,GOTO(0,E)=1入栈14Acc:分析成功4、输入符号串为非法符号串(或者为合法符号串)算术表达式文法的LR分析表状态ACTIONGOTOi+*()ET FS5S4S6accr2S7r4r6S11r1r3r5五、实验源程序import javax.swing.*;import java.awt.Dimension;import javax.swing.JButton;import java.awt.Rectangle;import java.util.Vector;import javax.
4、swing.JTextArea;import javax.swing.JTextField;import javax.swing.JLabel;import javax.swing.JMenuBar;import javax.swing.JMenu;import javax.swing.JMenuItem;import javax.swing.JScrollPane;import java.awt.BorderLayout;import javax.swing.JDialog;public class LR1 extends JFrame private static final long s
5、erialVersionUID = 1L; /* private char VN =new char50; /非终结符集 private char VT =new char50; /终结符集 private String F =new String50; /产生式集 private StringBuffer FirstVN; /非终结符的First集 private int staStack =new int50; /状态分析栈 private char symStack =new char50; /符号分析栈 private booleanVNE; /非终结符与空串的关系表 private
6、int F_index =0; /产生式数组指针 private int staStack_index=0; /状态栈指针 private int symStack_index=0; /符号栈指针 private int ERROR =Integer.MAX_VALUE; /出错标志 private char emp =; /空串 private String error =x /分析表显示的出错标志 / jve:decl-index=0: private String acc =acc /分析表显示的分析成功标志 private VectorVector State =new Vector
7、jLabel = new JLabel(); /jLabel.setForeground(Color.red); jLabel.setBounds(new Rectangle(16, 19, 57, 23); jLabel.setText(产生式: jPanel1.add(jLabel, null); jPanel1.add(getJTextField(), null); jPanel1.add(jLabel1, null); jPanel1.add(getJTextField1(), null); jPanel1.add(getJButton_delete(), null); jPanel1
8、.add(getJButton_ok(), null); jPanel1.add(getJButton_clearall(), null); jPanel1.add(getJButton_testPanel(), null); jPanel1.add(getJScrollPane2(), null); return jPanel1; private JPanel getJContentPane_testFrame() if (jContentPane_testFrame = null) jContentPane_testFrame = new JPanel(); jContentPane_te
9、stFrame.setLayout(null); jContentPane_testFrame.setBackground(null); jContentPane_testFrame.add(getJScrollPane_LR1States(), null); jContentPane_testFrame.add(getJScrollPane_LR1AnalysisTable(), null); jLabel_inputString = new JLabel(); jLabel_inputString.setText(请输入待测句子: jLabel_inputString.setBounds(
10、new Rectangle(29, 25, 108, 18); jContentPane_testFrame.add(jLabel_inputString, null); jContentPane_testFrame.add(getJTextField_testedString(), null); jContentPane_testFrame.add(getJButton_test(), null); jContentPane_testFrame.add(getJButton_fresh(), null); jContentPane_testFrame.add(getJButton_Trans
11、FunGraph(), null); jLabel_LR1States = new JLabel(); jLabel_LR1States.setText(LR1项目集 jLabel_LR1States.setBounds(new Rectangle(11, 65, 65, 18); jLabel_LR1States.addMouseListener(new java.awt.event.MouseAdapter() public void mouseReleased(java.awt.event.MouseEvent e) jTextArea_LR1States.setText( /准备数据
12、createAll(); /显示项目集 displayLR1States(); /*public void mouseExited(java.awt.event.MouseEvent e) jLabel_LR1States.setForeground(Color.black); public void mouseEntered(java.awt.event.MouseEvent e) jLabel_LR1States.setForeground(Color.green); */ ); jContentPane_testFrame.add(jLabel_LR1States, null); jLa
13、bel_LR1AnalysisTable = new JLabel(); jLabel_LR1AnalysisTable.setText(LR1分析表 jLabel_LR1AnalysisTable.setBounds(new Rectangle(264, 67, 66, 18); jLabel_LR1AnalysisTable.addMouseListener(new java.awt.event.MouseAdapter() jLabel_LR1AnalysisTable.setForeground(Color.black); public void mouseEntered(java.a
14、wt.event.MouseEvent e) jLabel_LR1AnalysisTable.setForeground(Color.green); jTextArea_LR1AnalysisTable.setText( displayLR1AnalysisTable(); jContentPane_testFrame.add(jLabel_LR1AnalysisTable, null); return jContentPane_testFrame; private JDialog getJDialog_TG() if (jDialog_TG = null) jDialog_TG = new
15、JDialog(); jDialog_TG.setSize(new Dimension(361, 266); /jDialog_TG.setTitle(LR1状态图 /jDialog_TG.setBackground(Color.black); jDialog_TG.setLocationRelativeTo(jFrame_testFrame); jDialog_TG.setContentPane(getJContentPane_TG(); return jDialog_TG; private JPanel getJContentPane_TG() if (jContentPane_TG = null) /jContentPane_TG = new TransformGraphPanel(); jContentPane_TG.setLayout(new BorderLayout(); return jContentPane_TG; private JTextField getJTextField() if (jTextField = null) jT
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