Question

List any two LEX library functions.

Answer 1

the two functions are :-

--Invokes the lexical analyzer by calling the yylex subroutine.

--Returns the value 1 when the end of input occurs.

hope my answer helps you

Answer 2

• Modern features of Lex Library, an open source documentation repository, include importing from a variety of documentation files and websites and using natural language processing for automated tagging and summaries.

• The yylex function is kept by the lex command in a file called lex. yy. c. The yylex function can be used independently to identify straightforward one-word input or in conjunction with other C language programmes to carry out trickier input analysis tasks.

• User-supplied procedures can be used to replace some of the lex subroutines. For instance, the lex command accepts user-supplied variations of the main and yywrap subroutines.

• yywrap(), a lex library function that is called each time the scanning approaches the end of something like a file, is one that you may redefine. The scanner proceeds with standard wrapup just on end of output if yywrap() returns 1.

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