# Calculate the length of a segment by taking the square root of the
# differences of the squares of the sum of the x and y coordinates
sub segment_length {
my ($p1, $p2) = @_;
sqrt(($p1->{x} + $p2->{x})**2 - ($p1->{y} + $p2->{y})**2)
}
####
# Return a random integer 1 .. 6 to simulate a die roll.
# Seed the random number generator with the current time before calculating.
sub roll {
srand(time);
1 + int rand 6;
}
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# CSS file
span.important {color: green} # Green stands out!
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my $code = $cgi->param("sql_query");
$dbh->do($code); # This is dangerous.