LEXICAL ANALYSIS
ROLE OF THE LEXICAL ANALYZER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The function ____ is automatically generated by the Lex when it is provided with a .l file
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flex()
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yylex()
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lex()
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nnlex()
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Explanation:
Detailed explanation-1: -If yywrap() returns a non-zero value (indicating true), yylex() terminates the scanning process and returns 0 (i.e. “wraps up”). If the programmer wishes to scan more than one input file using the generated lexical analyzer, it can be simply done by setting yyin to a new input file in yywrap() and return 0.
Detailed explanation-2: -lex also creates two important external data objects: A string named yytext. This string contains a sequence of characters making up a single input token. The token is read from the stream yyin, which, by default, is the standard input (stdin).
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