Solved

convert number to format

Posted on 2003-12-09
7
426 Views
Last Modified: 2010-03-04
Hello

I need to convert numbers like .7 and 2.3 to 00001 and 00011 respectivly.

examples
0.7 is to be rounded to 1 which is to be 00001
2.3 is to be rounded to 2 which is to be 00011
4.5 is to be rounded to 5 which is to be 11111

so here is my best shut
my $results = flt2bit5 ( .7);

sub flt2bit5 {
    my $n = shift;
    my $n = sprintf ("%.0f", $n);
   ´
I am not sure ....

thanks
0
Comment
Question by:samj
7 Comments
 
LVL 5

Accepted Solution

by:
arjanh earned 50 total points
ID: 9906803
This does the trick:

sub flt2bit5 {
   my $n = shift;
   my $res;
   for( my $i=5-int($n+0.5); $i>0; $i-- ) {
      $res .= "0";
   }
   for( $i=0; $i<int($n+0.5); $i++ ) {
      $res .= "1";
   }
   return $res;
}

int() is basically a floor() function, so by adding 0.5 you get an actual round(). You have to fill with 0 for 5-n digits and then print n times 1.
0
 
LVL 3

Expert Comment

by:terageek
ID: 9907259
You could also use the string mulitplication operator..

sub flt2bit5 {
   my ($n) = @_;
   $n = int ($n + 0.5);
   $n = 5 if ($n > 5);  # Just in case
   $n = 0 if ($n < 0);  # Just in case
   return "0" x (5 - $n) . "1" x $n;
}
0
 
LVL 2

Expert Comment

by:ultimatemike
ID: 9907305
2.3 is to be rounded to 2 which is to be 00011
                                                           


That should be 00010


0
Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

 
LVL 28

Expert Comment

by:FishMonger
ID: 9907550
If you're tring to convert to binary, then this will work.

use strict;

my @num = qw(0.7 2.3 4.5);

foreach (@num) {
   my $results = flt2bit5($_);
   print "$_ is to be rounded to ".sprintf ("%.0f", $_)." which is to be $results\n";
}

sub flt2bit5 {
   my $n = sprintf ("%.0f", shift);
   return sprintf ("%.5b", $n);
}
0
 
LVL 28

Expert Comment

by:FishMonger
ID: 9907602
If you want the output to be as you posted, then change the return statement to this:

return sprintf ("%0.5d", 1 x $n);
0
 

Author Comment

by:samj
ID: 9908838
thanks for to all for all the comments, arjanh had the fastest code when I benchmarked them.

thanks again
0
 
LVL 3

Expert Comment

by:terageek
ID: 9908859
FishMonger has it.  You won't even need the function call, just change it to:

my $results = spirntf("%0.5d", "1" x ($input + 0.5));

If inputut is less than 0, you will still get "00000", but if $input is > 5, you will get a field more than 5 characters.  Even the error checking can be done in one line...

my $results = sprintf("%0.5d", "1" x (($input > 4.5) ? 5 : $input + 0.5));
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
A year or so back I was asked to have a play with MongoDB; within half an hour I had downloaded (http://www.mongodb.org/downloads),  installed and started the daemon, and had a console window open. After an hour or two of playing at the command …
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.

806 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question