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In old versions of Fortran that did not have the character data type, character strings were expressed in the following format: ::= H where the is a base-ten integer (≥ 1), H is a keyword (named after Herman Hollerith), and is a sequence of characters. The semantics of this string literal is correct if the base-ten numeral's numeric value matches the string's length. Write an attribute grammar using only synthesized attributes for the nonterminals in the definition. Below is an example of an attribute grammar that defines the meaning of binary numerals consisting only of Synthesized Attributes. Base your answer on the example below. Val - stands for the attribute Value. Len - stands for the attribute Length. Nonterminals Synthesized Attributes Inherited Attributes Val Val, Len Val :: , 2 Val ()<- Val ()+ Val ()/2lm (chinary digits binary digits> ::- Val ()2 Val (>2) + Val () Len () + Len ()+1 | Val () Val () Len ( ::= 0 Val ()0 | 1 Val ()1

In old versions of Fortran that did not have the character data type, character strings were expressed in the following format: ::= H where the is a base-ten integer (≥ 1), H is a keyword (named after Herman Hollerith), and is a sequence of characters. The semantics of this string literal is correct if the base-ten numeral's numeric value matches the string's length. Write an attribute grammar using only synthesized attributes for the nonterminals in the definition. Below is an example of an attribute grammar that defines the meaning of binary numerals consisting only of Synthesized Attributes. Base your answer on the example below. Val - stands for the attribute Value. Len - stands for the attribute Length. Nonterminals Synthesized Attributes Inherited Attributes Val Val, Len Val :: , 2 Val ()<- Val ()+ Val ()/2lm (chinary digits binary digits> ::- Val ()2 Val (>2) + Val () Len () + Len ()+1 | Val () Val () Len ( ::= 0 Val ()0 | 1 Val ()1

Database System Concepts
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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In old versions of Fortran that did not have the character data type, character strings were expressed in the following format: <string literal> ::= <numeral> H <string> where the <numeral> is a base-ten integer (≥ 1), H is a keyword (named after Herman Hollerith), and <string> is a sequence of characters. The semantics of this string literal is correct if the base-ten numeral's numeric value matches the string's length. Write an attribute grammar using only synthesized attributes for the nonterminals in the <string literal> definition. Below is an example of an attribute grammar that defines the meaning of binary numerals consisting only of Synthesized Attributes. Base your answer on the example below. Val - stands for the attribute Value. Len - stands for the attribute Length. Nonterminals <binary numeral> <binary digits> <bit> Synthesized Attributes Inherited Attributes Val Val, Len Val <binary numeral> :: <binary digits>, <binary digits>2 Val (<binary numeral>)<- Val (<binary digits>)+ Val (<binary digits>)/2lm (chinary digits binary digits> ::- <binary digits> <bit> Val (<binary digits>)2 Val (<binary digits>>2) + Val (<bit>) Len (<binary digits>) + Len (<binary digits>)+1 | <bit> Val (<binary digits>) Val (<bit>) Len (<binary digits) 1 <bit> ::= 0 Val (<bit>)0 | 1 Val (<bit>)1
Transcribed Image Text:In old versions of Fortran that did not have the character data type, character strings were expressed in the following format: <string literal> ::= <numeral> H <string> where the <numeral> is a base-ten integer (≥ 1), H is a keyword (named after Herman Hollerith), and <string> is a sequence of characters. The semantics of this string literal is correct if the base-ten numeral's numeric value matches the string's length. Write an attribute grammar using only synthesized attributes for the nonterminals in the <string literal> definition. Below is an example of an attribute grammar that defines the meaning of binary numerals consisting only of Synthesized Attributes. Base your answer on the example below. Val - stands for the attribute Value. Len - stands for the attribute Length. Nonterminals <binary numeral> <binary digits> <bit> Synthesized Attributes Inherited Attributes Val Val, Len Val <binary numeral> :: <binary digits>, <binary digits>2 Val (<binary numeral>)<- Val (<binary digits>)+ Val (<binary digits>)/2lm (chinary digits binary digits> ::- <binary digits> <bit> Val (<binary digits>)2 Val (<binary digits>>2) + Val (<bit>) Len (<binary digits>) + Len (<binary digits>)+1 | <bit> Val (<binary digits>) Val (<bit>) Len (<binary digits) 1 <bit> ::= 0 Val (<bit>)0 | 1 Val (<bit>)1
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