Suppose that a PL permits only identifiers that begin with a letter, contain at least one but not more than three digits, and can have any number of letters. (a) Give a BNF grammar for such a set of identifiers. Assume the following productions for letters and digits: --> alb|c]...]z --> 0|1|2...|9

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Give a grammar and accepter for such et of identifiers. And also define the production rule by starting S->
Suppose that a PL permits only identifiers that
begin with a letter, contain at least one but not
more than three digits, and can have any number
of letters.
(a) Give a BNF grammar for such a set of
identifiers. Assume the following productions for
letters and digits:
<L> --> a|b|c...|z <D> --> 0[1|2|..19
Transcribed Image Text:Suppose that a PL permits only identifiers that begin with a letter, contain at least one but not more than three digits, and can have any number of letters. (a) Give a BNF grammar for such a set of identifiers. Assume the following productions for letters and digits: <L> --> a|b|c...|z <D> --> 0[1|2|..19
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