Problem with multiplying doubles

[christine]

Hello,

I wanted to create a currency translator with PHP.

The code looks like this:
<?php

$faktor=2.95583 ; // a double
$dm = $euro * $faktor; // $euro is a double variable with the
original value
// $dm is a double variable

echo $dm; // prints 10 when $euro is 5

?>

all varables are double, I checked this with the gettype() function
The calculation seems to take only the integers and cuttig off the .9
before calculating

Another example:
echo 5.5*2.2; // prints 10, should be about 11

what can I do if I want to multily doubles to get the correct answer?

I hope anyone can help me!
thanks in advance for your help!

christine

[Jon Kraft]

ch*******@hutt-edv.de (christine) wrote:

$faktor=2.95583 ; // a double
$dm = $euro * $faktor; // $euro is a double variable with the
original value
// $dm is a double variable

echo $dm; // prints 10 when $euro is 5
No, it prints 14.77915 when $euro is 5
Another example:
echo 5.5*2.2; // prints 10, should be about 11

No, it prints 12.1, and that's exactly what it should do.

JOn

[Savut]

No it worked for me ...

Savut

"christine" <ch*******@hu tt-edv.de> wrote in message
news:f1******** *************** ***@posting.goo gle.com...

Hello,

I wanted to create a currency translator with PHP.

The code looks like this:
<?php

$faktor=2.95583 ; // a double
$dm = $euro * $faktor; // $euro is a double variable with the
original value
// $dm is a double variable

echo $dm; // prints 10 when $euro is 5

?>

all varables are double, I checked this with the gettype() function
The calculation seems to take only the integers and cuttig off the .9
before calculating

Another example:
echo 5.5*2.2; // prints 10, should be about 11

what can I do if I want to multily doubles to get the correct answer?

I hope anyone can help me!
thanks in advance for your help!

christine

[Pedro Graca]

Jon Kraft wrote:

ch*******@hutt-edv.de (christine) wrote:

$faktor=2.95583 ; // a double
$dm = $euro * $faktor; // $euro is a double variable with the
original value
// $dm is a double variable

echo $dm; // prints 10 when $euro is 5

No, it prints 14.77915 when $euro is 5

Another example:
echo 5.5*2.2; // prints 10, should be about 11

No, it prints 12.1, and that's exactly what it should do.

JOn

$ cat xx.php
<?php
ini_set('precis ion', '2');

$euro = 5;
$faktor = 2.95583;
$dm = $euro * $faktor;

echo "--------\n$dm\n";

echo 5.5*2.2, "\n";
?>

$ php xx.php
--------
15
12

Check your php.ini !
--
--= my mail address only accepts =--
--= Content-Type: text/plain =--
--= Size below 10K =--

[christine]

ch*******@hutt-edv.de (christine) wrote in message news:<f1******* *************** ****@posting.go ogle.com>...

Hello,

I wanted to create a currency translator with PHP.

The code looks like this:
<?php

$faktor=2.95583 ; // a double
$dm = $euro * $faktor; // $euro is a double variable with the
original value
// $dm is a double variable

echo $dm; // prints 10 when $euro is 5

?>

all varables are double, I checked this with the gettype() function
The calculation seems to take only the integers and cuttig off the .9
before calculating

Another example:
echo 5.5*2.2; // prints 10, should be about 11

I installed PHP 4.3.4 instead of PHP 4.0.0 and now it works.

Thanks for your answers!

christine