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03-60-214: regular expression and automata

03-60-214: regular expression and automata. Winter 2010. Try RegexTester. Running at course web site as an applet; http://cs.uwindsor.ca/~jlu/214/regex_tester.htm Write regular expressions and try the match(), find() methods;. Try FSM simulator. Run the simulator

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03-60-214: regular expression and automata

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  1. 03-60-214: regular expression and automata Winter 2010 Jianguo Lu

  2. Try RegexTester • Running at course web site as an applet; • http://cs.uwindsor.ca/~jlu/214/regex_tester.htm • Write regular expressions and try the match(), find() methods; Jianguo Lu

  3. Try FSM simulator • Run the simulator • The java code can be downloaded at • http://cs.uwindsor.ca/~jlu/214/fsm.zip • Unzip the zip file • >unzip fsm.zip • Go to the directory fsmsim_bgm/classes • Run the java program: >java FSM • Define the FSM in the text file; • The text files are in fsm-sources • Generate the transition diagram; • Machine/new machine • Run the simulator and observe how strings are recognized. Jianguo Lu

  4. select “save target as” Jianguo Lu

  5. Construct and run a dfa from a text file Jianguo Lu

  6. NFA //Type (a|b)*abb Fig 3. 23 in dragon book a b // input alphabet q0 q1 q2 q3 // Machine states q0 // the initial state q3 // final state q0 b q0 // transitions: input state, input symbol, output state q3 b q0 q1 a q1 q2 a q1 q3 a q1 q0 a q1 q1 b q2 q2 b q3 end Jianguo Lu

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  10. Construct a dfa in GUI Jianguo Lu

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  12. JFLAP: RENFADFAm. DFA Jianguo Lu

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