a) As an intermediate step in the construction of a lexical analyzer, a conversion of patterns into stylized flowcharts called transition diagrams is performed. Transition diagrams have a collection of nodes or circles, called states. Each state represents a condition that could occur during the process of scanning the input looking for a lexeme that matches one of several patterns. Edges are directed from one state of the transition diagram to another. Although there is a mechanical way to construct these transition diagrams from collections of regular expressions, hand conversion from regular expression patterns to transition diagrams can also be performed. Using hand conversion, construct transition diagrams to recognize the same languages as each of the regular expressions: (i) a(a | b)* a (ii) (a | b)'a (a|b)(alb) (iii) a'ba"ba'ba"

a) As an intermediate step in the construction of a lexical analyzer, a conversion of patterns into stylized flowcharts called transition diagrams is performed. Transition diagrams have a collection of nodes or circles, called states. Each state represents a condition that could occur during the process of scanning the input looking for a lexeme that matches one of several patterns. Edges are directed from one state of the transition diagram to another. Although there is a mechanical way to construct these transition diagrams from collections of regular expressions, hand conversion from regular expression patterns to transition diagrams can also be performed. Using hand conversion, construct transition diagrams to recognize the same languages as each of the regular expressions: (i) a(a | b)* a (ii) (a | b)'a (a|b)(alb) (iii) a'ba"ba'ba"

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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