parser for the grammar

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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9. It is required to write a parser for the grammar below.

<source_file> ::= <declarations> <code>

 <declarations> ::= vars <list_of_variables> ;

<list_of_variables> ::= <variable> | <list_of_variables> , <variable>

<code> ::= <statements> .

<statements> ::= <assignment> | <statements> ; <assignment>

<assignment> ::= <variable> := <expression>

<expression> ::= <expression> + <term> | <expression> - <term> | <term>

<term> ::= <term> * <factor> | <term> / <factor> | <factor>

<factor> ::= <number> | <variable>

 

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