In certain programming languages, comments appear between delimiters such as (# and #). • A comment must begin with (# and end with #). • A comment may not contain #) inside the comment. • A comment’s delimiters must be separate: (##) is a comment, (#) is not. • For simplicity, assume that the alphabet is  = {a, b, (, ), #}. Give a regular expression that accepts comments.

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
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In certain programming languages, comments appear between delimiters such as (# and #).
• A comment must begin with (# and end with #).
• A comment may not contain #) inside the comment.
• A comment’s delimiters must be separate: (##) is a comment, (#) is not.
• For simplicity, assume that the alphabet is  = {a, b, (, ), #}.
Give a regular expression that accepts comments.

 

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