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#!/bin/perl
#
#
use Carp;
use Math::Utils qw(:polynomial);
use Math::Complex;
use strict;
use warnings;
while (my $line = prompt("Polynomial: "))
{
my @polynomial = split(/,? /, $line);
last unless ($line);
my $x = prompt("x-value: ");
d1(\@polynomial, $x);
d2(\@polynomial, $x);
}
exit(0);
sub d1
{
my($p_ref, $x) = @_;
my($r, $d1, $d2) = pl_dxevaluate($p_ref, $x);
print "Polynomial: $r, First derivative: $d1, Second derivative $d2\n\n";
}
sub d2
{
my($p_ref, $x) = @_;
my @d1p = pl_derivative(@$p_ref);
my @d2p = pl_derivative(@d1p);
my $r = pl_evaluate($p_ref, $x);
my $d1 = pl_evaluate(\@d1p, $x);
my $d2 = pl_evaluate(\@d2p, $x);
print "Polynomial: $r, First derivative: $d1, Second derivative $d2\n\n";
}
sub prompt
{
my $pr = shift;
print $pr;
my $inp = <>;
chomp $inp;
return $inp;
}
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