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perl: How to improve with minimal validation of its input??

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# 1  
Old 04-18-2012
perl: How to improve with minimal validation of its input??
The Code:
Code:
#!/usr/bin/perl
use strict;
use warnings;


print "Please enter numbers, separated by commas: ";
my $data=<STDIN>; chomp $data;
my @dataset=split(/,/, $data);


my $sum = 0;
foreach my $num (@dataset) {
$sum += $num;
}


my $total_nums = scalar(@dataset);
my $mean = ($sum/@total_nums);
print "Mean: ", $mean, "\n";

Looking to:

Improve the following to do minimal validation of its input. In particular, it should exclude any inputs which are not numeric (instead of just converting them to zero), and it should NOT cause a divide by zero error if there are no valid inputs.

Moderator's Comments:
Mod Comment Please consider using fixed pitch fonts like Courier in code. We are not super-artistic here.
Last edited by jim mcnamara; 04-19-2012 at 12:30 AM.. Reason: Removed weird fonts
# 2  
Old 04-19-2012
Google these,
  • Using character classes in perl
  • Handling errors with die and warn
you'll get your solution
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