11. Consider the following grammar [15pts] 1. prog → A 2. prog expr ';' 3. expr → ID expr '-' expr expr '/ expr expr '?' expr ':' expr 4. expr 5. expr 6. expr 7. expr → '(' expr ')' *The start symbol is prog; ID and the quoted characters are the terminals. a. Modify the grammar to be LL(1) (unambiguous) b. Show the FIRST and FOLLOW sets

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
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11. Consider the following grammar [15pts]
1. prog → A
2. prog → expr ';'
3. expr
ID
>
4. expr → expr
expr
5. expr
expr '7' expr
expr '?' expr ':' expr
6. expr
7. expr → '(' expr ')'
*The start symbol is prog; ID and the quoted characters are the terminals.
a. Modify the grammar to be LL(1) (unambiguous)
b. Show the FIRST and FOLLOW sets
Transcribed Image Text:11. Consider the following grammar [15pts] 1. prog → A 2. prog → expr ';' 3. expr ID > 4. expr → expr expr 5. expr expr '7' expr expr '?' expr ':' expr 6. expr 7. expr → '(' expr ')' *The start symbol is prog; ID and the quoted characters are the terminals. a. Modify the grammar to be LL(1) (unambiguous) b. Show the FIRST and FOLLOW sets
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