Pearson eText for Concepts of Programming Languages -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135102268
Author: Robert Sebesta
Publisher: PEARSON+
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Textbook Question
Chapter 3, Problem 1PS
The two mathematical models for language description are:
- Recognition
- Generation
These two mathematical models can define the syntax of
Recognition:
- It works on yes or no basis. In this method, a
mechanism called recognition device (R) is used that can read strings from the given alphabet. - This would indicate whether the input string is in language or not. That means, it will either accept the string or reject the string.
- Recognition device filters the correctly formed sentences from those that are incorrectly formed.
- In recognition, recognizer is used for syntax. analysis. Recognizer does not check for all possible strings but it simply check if the given programs are in the language or not.
- It checks the syntactical part of the program.
Generation:
- In this method, a device named generator is used to generate the sentences in a language.
- Whenever a generator is called, it generator a sentence which is unpredictable.
- When a string is to be checked if it is a correct or incorrect, first of all, it calls the generator to generate a correct sentence.
- Then, it compares the correct generated string with the input string.
- Hence, it determines the correction in string.
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Chapter 3 Solutions
Pearson eText for Concepts of Programming Languages -- Instant Access (Pearson+)
Ch. 3 - Prob. 1RQCh. 3 - Prob. 2RQCh. 3 - Prob. 3RQCh. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - Prob. 6RQCh. 3 - Prob. 7RQCh. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - What is the difference between a synthesized and...
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Prob. 13RQCh. 3 - Prob. 14RQCh. 3 - Prob. 15RQCh. 3 - Prob. 16RQCh. 3 - Prob. 17RQCh. 3 - Prob. 18RQCh. 3 - Prob. 19RQCh. 3 - Prob. 20RQCh. 3 - Prob. 21RQCh. 3 - What does partial correctness mean for a loop...Ch. 3 - Prob. 23RQCh. 3 - Prob. 24RQCh. 3 - Prob. 25RQCh. 3 - Prob. 26RQCh. 3 - Prob. 27RQCh. 3 - Prob. 28RQCh. 3 - Prob. 29RQCh. 3 - The two mathematical models for language...Ch. 3 - Write EBNF descriptions for the following: a. A...Ch. 3 - Prob. 3PSCh. 3 - Prob. 4PSCh. 3 - Prob. 5PSCh. 3 - Prob. 6PSCh. 3 - Prob. 9PSCh. 3 - Prob. 10PSCh. 3 - Prob. 12PSCh. 3 - Prob. 15PSCh. 3 - Prob. 16PSCh. 3 - Prob. 17PSCh. 3 - Prob. 18PSCh. 3 - Compute the weakest precondition for each of the...
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