small inaccuracies


Posted on 16th Feb 2014 07:03 pm by admin

I have this code to convert fractional base 10 into base 2:

while($num > 0)
{
Did you know?Explore Trending and Topic pages for more stories like this.
echo "<tr><td>". $num." * 2 = </td><td>". $num*2 ."</td></tr>";
$num= $num*2;
if($num>= 1)
{ $num-= 1; $bin .= "1"; }
else
{ $bin .= "0"; }
}

anyway, stuff gets off, example:

Quote0.7 * 2 = 1.4
0.4 * 2 = 0.8
0.8 * 2 = 1.6
0.6 * 2 = 1.2
0.2 * 2 = 0.4
0.4 * 2 = 0.8
0.8 * 2 = 1.6
0.6 * 2 = 1.2
0.2 * 2 = 0.4
0.4 * 2 = 0.8
0.8 * 2 = 1.6
0.6 * 2 = 1.2
0.2 * 2 = 0.4
0.4 * 2 = 0.799999999999
0.799999999999 * 2 = 1.6
0.599999999999 * 2 = 1.2
0.199999999997 * 2 = 0.399999999994
0.399999999994 * 2 = 0.799999999988
0.799999999988 * 2 = 1.59999999998
0.599999999977 * 2 = 1.19999999995
0.199999999953 * 2 = 0.399999999907
0.399999999907 * 2 = 0.799999999814
0.799999999814 * 2 = 1.59999999963
0.599999999627 * 2 = 1.19999999925
0.199999999255 * 2 = 0.39999999851
0.39999999851 * 2 = 0.79999999702
0.79999999702 * 2 = 1.59999999404
0.59999999404 * 2 = 1.19999998808
0.199999988079 * 2 = 0.399999976158
0.399999976158 * 2 = 0.799999952316
0.799999952316 * 2 = 1.59999990463
0.599999904633 * 2 = 1.19999980927
0.199999809265 * 2 = 0.39999961853
0.39999961853 * 2 = 0.799999237061
0.799999237061 * 2 = 1.59999847412
0.599998474121 * 2 = 1.19999694824
0.199996948242 * 2 = 0.399993896484
0.399993896484 * 2 = 0.799987792969
0.799987792969 * 2 = 1.59997558594
0.599975585938 * 2 = 1.19995117188
0.199951171875 * 2 = 0.39990234375
0.39990234375 * 2 = 0.7998046875
0.7998046875 * 2 = 1.599609375
0.599609375 * 2 = 1.19921875
0.19921875 * 2 = 0.3984375
0.3984375 * 2 = 0.796875
0.796875 * 2 = 1.59375
0.59375 * 2 = 1.1875
0.1875 * 2 = 0.375
0.375 * 2 = 0.75
0.75 * 2 = 1.5
0.5 * 2 = 1
obviously, 0.4 * 2 does not equal 0.799999999999

how can i fix these inaccuracies?
No comments posted yet

Your Answer:

Login to answer
249 Like 9 Dislike
Previous forums Next forums
Other forums

newbie error
what is wrong with this code ?

<html>
<body>

<?

A little help in c#
i am doing a simple paint program using c# i want to draw with the mouse so i wrote the code of the

media recovery
Hi,
i startup the database i got the error

SQL> startup
ORACLE instance started.

with clause
hi all, i have a big query that usually access the same table more than once. for example, i have s

Running a cron job through PHP/Apache?!
Hello all,
I have a PHP script which makes a cron file from user input. When i try to run the cro

Displaying a record from mysql in a simple swf file
Hi,

I have a mysql database containing information I would like to display in my swf.

PDO returns erroneous columns from within pdt
Hi All,

This is a truly weird behavior:
When using a simple pdo fetch, erroneous columns a

Casting Decimals in Oracle
This code worked as a query in DB2, but I am not sure what the syntax is for casting decimals in Ora

MySQL-PHP Query Results Help
Hello all. I'm hoping to be able to get some help in solving a problem with query/rowcount output. I

Content-Disposition: attachment; filename=... not working as i thought it should
taken the following code from the php.net site the script is not working.

what is not happeni

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash