Hello, fatmac, and welcome to the Monastery!

As you’ve no doubt found, typing in test data from the console quickly becomes tedious when you’re developing a script. What you need is a way to input data from the script itself but using the same syntax you would use for reading from the console (or from a separate data file). In Perl, that way is provided by the DATA filehandle, which reads input from the bottom of the script file beginning immediately after a line consisting of the __DATA__ token. The following script (which incorporates much of the advice of Gangabass and philiprbrenan, above) illustrates the use of DATA:

#! perl
use strict;
use warnings;

my $fh = \*DATA;    # For user input, change to: \*STDIN

print "\nMulti Gear Calculator\n\n";

print "Enter Wheelsize (inches): ";
my    $wheel = <$fh>;
print $wheel;
chomp $wheel;

print "Enter Chainwheel Teeth:   ";
my    $chwhs = <$fh>;
print $chwhs;
my    @chwhs = split /\s+/, $chwhs;

print "Enter Cog Teeth:          ";
my    $cogs  = <$fh>;
print $cogs;
my    @cogs  = split /\s+/, $cogs;

my    @gears;

for (0 .. 8)
{
    $gears[$_ +  1] = $wheel * $chwhs[0] / $cogs[$_];
    $gears[$_ + 10] = $wheel * $chwhs[1] / $cogs[$_];
    $gears[$_ + 19] = $wheel * $chwhs[2] / $cogs[$_];
}

print "\nYour gears are:\n\n";

print 'Wheelsize:   ',           $wheel,  "\n"; 
print 'Chainwheels: ', join(' ', @chwhs), "\n";
print 'Sprockets:   ', join(' ', @cogs),  "\n\n";

for (1 .. 27)
{
    printf "%6.2f ", $gears[$_];
    print  "\n\n" if $_ % 9 == 0;
}

__DATA__
26.5
42 32 22
11 13 15 17 19 21 24 28 32

[download]

When you’re finished testing, and want to use the script to input data from the console, simply change the line

my $fh = \*DATA;

[download]

to

my $fh = \*STDIN;

[download]

and you’re there!

Hope that helps,

Athanasius <°(((>< contra mundum

In reply to Re: I'm trying to get a numeric array by Athanasius
in thread I'm trying to get a numeric array by fatmac

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