?
Solved

Random number generator for even numbers only (500 points)

Posted on 2008-06-16
3
Medium Priority
?
220 Views
Last Modified: 2010-04-05
I need to quickly generate a random number between 1000 and 65000 but it must be even.  

I am using Delphi 6.  

I am giving the maximum 500 points as this is urgent.  Many thanks for your help.
0
Comment
Question by:rincewind666
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 14

Accepted Solution

by:
SteveBay earned 2000 total points
ID: 21796928
I think this is what you want:
function TForm1.RandEven: Integer;
begin
     Randomize;
     repeat
          Result :=  (Random( 64000 ) + 1000);
     UNtil (Result Mod 2) = 0
 
end;

Open in new window

0
 

Author Comment

by:rincewind666
ID: 21797022
SteveBay, many thanks for your help.  Greatly appreciated.
0
 
LVL 2

Expert Comment

by:TheVanter
ID: 21797079
Randomize;
numberwanted := Random(500 + random(32000)) * 2;

The randomize is needed to mix up the pseudo-random numbers generated by the time.

or for a variable even range:
function randomeven(min, max: double): double;
var range, tmp : double;
  begin
  Randomize;
  if min > max then
    begin
    tmp := min;
    min := max;
    max := tmp;
    end;
  min := min / 2;
  max := max / 2;
  range := max - min;
  randomeven := (min + Random * range) * 2;
  end;

Open in new window

0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
Suggested Courses

770 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