20101102

20101102 - Change the grammar to E -> E + T | E T ->...

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============================ CS 441 Fall 2010 -- JWJ Pre-class notes - do not distribute Tuesday, November 2, 2010 ============================ Topics First experience with Bison to create a simple calculator. Tasks Most of our class will be in the Multilab. - create a directory 20101102 - copy sources from http://www.epaperpress.com/lexandyacc/index.html to 20101102 - inspect the contents of the directory. Unzip if necessary - read the sources: calc1.l, calc2.y - inspect 'build' and make calc1.exe Note: the last step may need some adjustements, changing the code, etc. - add to calc2.y provision for additional operations by extending the grammar - the compilation produces errors. It is because of the grammar ambiguity.
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Unformatted text preview: Change the grammar to E -> E + T | E T -> T * F | F F -> (E) | integer- make executables for the above version; do you need to change calc1.l?- make calc3.exe Sources On-line resource: http://www.lugbe.ch/action/reports/lex_yacc.pdf (Tom Niemann tutorial on Lex and Yacc) http://www.epaperpress.com/lexandyacc/index.html Programming Assignment PA2a Play with the code from the above Web pages. Write three programs in the language described in the above tutorial. Show the syntax-trees and the code for your sample programs. One of the programs should compute the number of combinations C(n,k) using an iterative algorithm....
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This document was uploaded on 12/14/2010.

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