Question

implement a lexical analyzer that returns a token lexeme pair to recognize vaild C/C++ identifiers. (you...

implement a lexical analyzer that returns a token lexeme pair to recognize vaild C/C++ identifiers. (you do not have to exclude the reserve words).

Do not use String library.

run the program once to accept a valid identifier

second time to reject a string that is not an indentifier.

Submit code, screen shot of each execution

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Answer #1

I'm providing you a lex program with steps to execute(I'm not sure if you want lex program or C program do mention in comments).

  • Make sure that you have flex installed in your ubuntu terminal.
  • Save file as file_name.l
  • Compile the file : lex file_name.l
  • Gives a C file and then compile it with using cc lex.yy.c
  • Execute ujsing ./a.out

Code:

Output:

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