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Re^4: Regarding the polynomial evaluation. Stuck at one part. please helpppp!!

by Anonymous Monk
on Jan 22, 2013 at 15:09 UTC ( #1014686=note: print w/ replies, xml ) Need Help??


in reply to Re^3: Regarding the polynomial evaluation. Stuck at one part. please helpppp!!
in thread Calculating polynomials and pushing them into an array. Stuck at one part. please helpppp!!

more clearer , still avoid string-eval

#!/usr/bin/perl -- use strict; use warnings; my $blah = q{-0.137 + (0.00479 / (W/0.9)) + (2.5593 * (W/0.9 ) ,0.045 +,0 }; print EvalPolynominal( $blah, 1,1 ); sub EvalPolynominal { #first parameter gives the polynominal string #second parameter gives the min-des width #third parameter gives the short-line length my $polynominal = shift; my $curWidth = shift; my $curLength = shift; $polynominal =~ s/W/$curWidth/g ;#replace W with current value of +min width $polynominal =~ s/L/$curLength/g ;#replace L with current value of + min Length local $@; my $ret = eval $polynominal; warn "Trying:\n\t$polynominal\nbut got: $@\n" if $@; return $ret; } __END__ $ perl -we " -0.137 + (0.00479 / (1/0.9)) + (2.5593 * (1/0.9 ) ,0.045 +,0 " syntax error at -e line 1, at EOF Execution of -e aborted due to compilation errors. $ perl blah Trying: -0.137 + (0.00479 / (1/0.9)) + (2.5593 * (1/0.9 ) ,0.045,0 but got: syntax error at (eval 1) line 2, at EOF Use of uninitialized value in print at blah line 4. $ perl -we " -0.137 + (0.00479 / (1/0.9)) + (2.5593 * (1/0.9 ) ,0.045 +,0 " syntax error at -e line 1, at EOF Execution of -e aborted due to compilation errors.


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