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Published on 2009-11-15T13:24:47Z
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I'm given a yacc file and I'm supposed to create a symbol table. What do I do after I use yacc on the file?
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how to download lex and lex.yy.c and yacc in ubuntu9.10 ?
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Does anyone know an online repository for lex/yacc format grammars? I'm looking for a Java grammar to make a quicky sourcecode converter.
Thank you!
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how to download lex and lex.yy.c and yacc in ubuntu9.10 ?
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I have a YACC (Bison) grammar, a Lex (Flex) tokenizer, and a C program among which I need to share a struct (or really any variable). Currently, I declare the actual object in the grammar file and extern it wherever I need it (which is to say, my C source file), usually using a pointer to manipulate…
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I am wondering how to correctly compile a program with a Makefile that has calls to yyparse in it?
This is what I do:
I have a Makefile that compiles all my regular files and they have no connections to y.tab.c or lex.yy.c (Am I supposed to have them?)
I do this on top of my code:
#include "y…
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;; structure representing homework points
;; nr: number - the number of the homework
;; points: number - the number of points reached
(define-struct homework (nr points))
;; parse-homework: (list of number pairs) -> (list of homework)
;; The procedure takes a list of number pairs and produces…
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Okay so I have started a new language in class. We are learning Scheme and i'm not sure on how to do it. When I say learning a new language, I mean thrown a homework and told to figure it out. A couple of them have got me stumped.
My first problem is:
Write a Scheme function that returns true (the…
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I'm very new to Unix, and currently taking a class learning the basics of the system and its commands.
I'm looking for a single command line to list off all of the user home directories in alphabetical order from the /etc/passwd directory. This applies only to the home directories, and not the contents…
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Hi,
For a school project i need to write or use a online programming editor. It is a part of a bigger project. I thought of a java application, php/html/javascript or flash.
I have a couple of things i could do:
Find a good working application and edit it so it works with the rest of the project
Find…
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Consider a disk file containing 100 records
a. How many comparisons would be required on the average to find a record using sequential search, if the record is known to be in the file?
I figured out that this is 100/2 = 50.
b. If the record has a 68% probability of being in the file, how many comparisons…
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