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

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

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

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

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