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catonthecouchproductionsFlag for United States of America

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Calculations coming out wrong

I am working on making a car calculator for loans, I have:

#!/usr/bin/perl
print "Content-type:text/html \n\n";
use CGI qw(:standard);

my $cost       =    param('cost')     || '0.00';
my $payment    =    param('payment')  || '0.00';
my $interest   =    param('interest') || '0.10';
my $down       =    param('down')     || ($cost * 0.20);
my $loan       =    param('loan')     || '5.00';

my $due        =    ($cost - $down) * (1 + $loan * $interest / 100);

my $month      =    $due / (12 * $loan);

# if nothing default values below

# print output of all entered values

my $output = <<_END_;

<b>Cost:</b> $cost <br />
<b>Payment:</b> $payment <br />
<b>Interest:</b> $interest <br />
<b>Down:</b> $down <br />
<b>Loan:</b> $loan <br />
<br /><br />
<b>Amount due each month:</b> $month

_END_
print $output;

And I am getting the wrong output for the monthly amount due. Any suggestions on what I can do to fix the output, it is coming out very large.

Link: http://elan.champlain.edu/~rcoughlin32001/carcalculator.html

Thanks,

Ryan
Avatar of Tintin
Tintin

Given that this is an assignment question, we can only offer pointers.

My tip is for you to read through perlop

perldoc perlop

If you are getting the wrong output, what would be the correct output?
What is the relationship between $month and $loan?
Avatar of catonthecouchproductions

ASKER

This isnt an assignment one, it is being hosted on the Champlains server, I did read that you can only handle pointers for assignment questions and that is perfectly fine with me. This is an extra case study I am doing out of the book, the class is kicking my butt, haha.

I will take a look at that, what you said above.

$month is how much you are going to pay a month
$loan is how many years you want a loan for

Sorry, I should have made that clear for you guys.

Thanks,

Ryan
I am using what is given the extra case study I am doing for the heck of it. That is what they gave me for it.

Ryan
Have a look at my last post to your other question {http://Q_22868164}
ASKER CERTIFIED SOLUTION
Avatar of mjcoyne
mjcoyne

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