very 1st question for my baby-walk coding

isisgu has asked for the wisdom of the Perl Monks concerning the following question:

Hi,

I am learning the perl. During my very baby-walk coding, I kept getting this error:

BEGIN not safe after errors--compilation aborted at /System/Library/Perl/5.12/Carp/Heavy.pm line 4. Compilation failed in require at /Users/apple/Library/Application Support/TextMate/Managed/Bundles/Perl.tmbundle/Support/exception_handler.pm line 30.

My actual codes:

#!/usr/bin/perl

use strict;

use warnings;

my $pi = 3.141592654;

print "what is the radius?\n";

my ($radius)= ;

$radius = <STDIN>;

chomp $radius;

my ($circ) = 2* $pi * $radius;

print "the circumference of a circle of $radius is $circ.\n";

Thanks

Comment on very 1st question for my baby-walk coding

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Re: very 1st question for my baby-walk coding by LanX (Saint) on Apr 03, 2014 at 00:44 UTC
`my ($radius)= ; # empty assignment? :) delete the = $radius = <STDIN>;` [download] Cheers Rolf ( addicted to the Perl Programming Language)	[reply] [d/l]
Re: very 1st question for my baby-walk coding by AnomalousMonk (Archbishop) on Apr 03, 2014 at 01:49 UTC
I also suggest using code tags (`<code> ... </code>` or `<c> ... </c>`) around an entire block of your code rather than paragraph tags `<p> text </p>` on each and every line. Please see Markup in the Monastery, Writeup Formatting Tips, Perl Monks Approved HTML tags and What shortcuts can I use for linking to other information?. Oh, and How do I compose an effective node title?.	[reply] [d/l] [select]
Re: very 1st question for my baby-walk coding (textmate) by Anonymous Monk on Apr 03, 2014 at 00:38 UTC
I suggest running your code from shell and not from textmate You have a choice, debugging textmate/Perl.tmbundle or your own perl code :) Running your code from shell is discussed in the following Behind the GUI lives the Shell and perlintro / perlrun	[reply]
Re: very 1st question for my baby-walk coding by Discipulus (Canon) on Apr 03, 2014 at 06:59 UTC
sorry but is this unknown TextMate masking the error? And why it is reporting about Carp::Heavy? The empty assignement must be the error: `C:\SCRIPTS>perl -e "use strict; use warnings; my ($a)=;" syntax error at -e line 1, near "=;" Execution of -e aborted due to compilation errors.` [download] L* There are no rules, there are no thumbs.. Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.	[reply] [d/l]