Concepts of Programming Languages (11th Edition)
11th Edition
ISBN: 9780133943023
Author: Robert W. Sebesta
Publisher: PEARSON
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Chapter 4, Problem 13RQ
Explanation of Solution
The reason named constants are used:
The lexical analyzers collect the characters of the input string and group them into logical groups according to the pattern matching rules. These logical groupings are called as lexemes.
Lexical analyzer assigns some internal (numeric) codes to the lexemes (logical groupings) according to their structure. Instead of assigning numeric codes, named constants are used for token codes due to the following reasons:
- Gives better readability to the code...
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Chapter 4 Solutions
Concepts of Programming Languages (11th Edition)
Ch. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - Prob. 16RQCh. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - Prob. 19RQCh. 4 - Prob. 20RQCh. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - What was Knuths insight in developing the LR...Ch. 4 - Prob. 25RQCh. 4 - Prob. 26RQCh. 4 - Is left recursion a problem for LR parsers?Ch. 4 - Prob. 1PSCh. 4 - Prob. 2PSCh. 4 - Prob. 3PSCh. 4 - Prob. 4PSCh. 4 - Prob. 7PSCh. 4 - Prob. 8PS
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- Not recursivearrow_forwardthe research into computers What are the advantages and disadvantages of passing by value vs passing by reference, respectively?arrow_forwardDemonstrate Recursion Assignment Instructions Overview The programs we’ve discussed so far are generally structured as methods that call one another in a hierarchical manner. For some problems, it’s useful to have a method call itself—this is known as a recursive method. Such a method can call itself either directly or indirectly through another method. Recursion is an important topic discussed at length in upper-level computer-science courses. Instructions Write a recursive method printArray() that displays all the elements in an array of integers, separated by spaces. The array must be 100 elements in size and filled using a for loop and a random number generator. The pseudo-code for this is as follows: //Instantiate an integer array of size 100 //fill the array For (int i=0; i<array.length; i++) Array[i] = random number between 1 and 100 inclusive printArray(integer array); For this assignment make sure that your screen shots show your program running and that your runtime…arrow_forward
- 'Type' is not enough to define a variable. All variables contain data types and other characteristics, in other words. How can we express any variable's characteristics using the idea that allows us to do so?arrow_forwardBriefly explain floating-point literalarrow_forwardQuèstion 24 Methods are used to implement all assignment, relational and arithmetic operators in some programming languages e.g. Ruby and Racket. True Falsearrow_forward
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