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私はJFlexの初心者です。私はUbuntuに取り組んでおり、JavaとJFlexをインストールしました。java コマンドと jflex コマンドの両方が機能しているため、PATH 変数が適切に設定されています。jflex ファイルを実行すると、エラーなしで実行されますが、.java ファイルの実行中には、sym に関する一連のエラーが発生します。私の実行行は以下の通りです...

jflex abc.jflex
javac -cp java-cup-0.11a.jar PascalLexer.java

エラーは次のとおりです。

pratik@pratik-Lenovo-G550:~/myFlex$ javac -cp java-cup-0.11a.jar PascalLexer.java 
PascalLexer.java:663: error: cannot find symbol
          { return newSym(sym.TYPE);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:667: error: cannot find symbol
          { return newSym(sym.REAL, new Double(yytext()));
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:671: error: cannot find symbol
          { return newSym(sym.GTR);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:675: error: cannot find symbol
          { return newSym(sym.ASSMNT);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:679: error: cannot find symbol
          { return newSym(sym.ELSE);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:683: error: cannot find symbol
          { return newSym(sym.THEN);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:687: error: cannot find symbol
          { return newSym(sym.VAR);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:691: error: cannot find symbol
          { return newSym(sym.IDENT, yytext());
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:695: error: cannot find symbol
          { return newSym(sym.MINUS);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:699: error: cannot find symbol
          { return newSym(sym.SEMI);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:703: error: cannot find symbol
          { return newSym(sym.NOT_EQ);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:711: error: cannot find symbol
          { return newSym(sym.COMMA);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:715: error: cannot find symbol
          { return newSym(sym.IF);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:719: error: cannot find symbol
          { return newSym(sym.RT_PAREN);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:723: error: cannot find symbol
          { return newSym(sym.OR);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:727: error: cannot find symbol
          { return newSym(sym.EQ);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:731: error: cannot find symbol
          { return newSym(sym.RT_BRKT);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:735: error: cannot find symbol
          { return newSym(sym.DIVIDE);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:739: error: cannot find symbol
          { return newSym(sym.DOT);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:743: error: cannot find symbol
          { return newSym(sym.PROCEDURE);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:747: error: cannot find symbol
          { return newSym(sym.CHAR, new Character(yytext().charAt(1)));
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:751: error: cannot find symbol
          { return newSym(sym.LEFT_PAREN);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:755: error: cannot find symbol
          { return newSym(sym.BEGIN);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:759: error: cannot find symbol
          { return newSym(sym.END);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:763: error: cannot find symbol
          { return newSym(sym.GTR_EQ);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:767: error: cannot find symbol
          { return newSym(sym.PROGRAM);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:771: error: cannot find symbol
          { return newSym(sym.AND);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:775: error: cannot find symbol
          { return newSym(sym.ARRAY);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:779: error: cannot find symbol
          { return newSym(sym.LESS_EQ);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:783: error: cannot find symbol
          { return newSym(sym.OF);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:787: error: cannot find symbol
          { return newSym(sym.INT, new Integer(yytext()));
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:796: error: cannot find symbol
          { return newSym(sym.PLUS);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:800: error: cannot find symbol
          { return newSym(sym.LEFT_BRKT);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:804: error: cannot find symbol
          { return newSym(sym.LESS);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:813: error: cannot find symbol
          { return newSym(sym.TIMES);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:817: error: cannot find symbol
          { return newSym(sym.COLON);
                          ^
  symbol:   variable sym
  location: class PascalLexer
PascalLexer.java:824: error: cannot find symbol
              { return new java_cup.runtime.Symbol(sym.EOF); }
                                                   ^
  symbol:   variable sym
  location: class PascalLexer
37 errors
4

1 に答える 1

0

Linux の場合:

javac -cp .*:java-cup-0.11a.jar PascalLexer.java

Windows の場合:

javac -cp .*;java-cup-0.11a.jar PascalLexer.java

Linux クラスパスは で区切られ、:Windows は で区切られ;ます。必要なすべてのライブラリをコマンドに含め、すべて適切な区切り文字で区切ってください。ライブラリの場所を指定する必要があるため、java-cup-0.11a.jar が現在の作業ディレクトリにない場合は、-cp引数でそのファイルへのパスを指定する必要があります。

于 2014-03-05T15:41:15.157 に答える