Computer Science Canada

random real numbers
Author:  DJ [ Thu Aug 07, 2003 3:35 pm ]
Post subject:  random real numbers
i wanna make random real numbers between a certain range.
i wanna make these real numbers prices, so ineed a decimal cutoff
how?
Author:  poly [ Thu Aug 07, 2003 5:27 pm ]
Post subject: 
ooops what I posted here was for integers, sorry!
Author:  AsianSensation [ Thu Aug 07, 2003 7:04 pm ]
Post subject: 
Rand.Real

it generates a real number between 0 and 1

then just multiply it by a multiplier if you want bigger numbers to be generated

for example, you want a real number between 0 and 100

num:=Rand.Real * 100
Author:  DJ [ Thu Aug 07, 2003 9:54 pm ]
Post subject: 
but if i want a random real number between 1 and 100 and with 2 decimal places?
i dunno how to use the round function, the help thing dont help
Author:  kmd-10 [ Thu Aug 07, 2003 10:00 pm ]
Post subject: 
ok .. use Rand.Real, giving you a number between 0 and 1.
then use a multiplier.
then multiply it by 100.
then use round(n).
then divide by 100, and throw in your dollar sign.

code:

var num : real
var int_num : int
var multiplier : int := 100 % now it's a number from 0 to 100.

num := Rand.Real * multiplier * 100
int_num := round(num)
num := int_num / 100



you could shorten this, but it's to show you what i mean.

code:

var multiplier : int := 10000
var num : real := (round(Rand.Real * multiplier)) / 100



and then after that, you'd need to do your check to add necessary zeroes. but that shouldn't be a problem.
Author:  DJ [ Sun Aug 10, 2003 10:03 pm ]
Post subject: 
wow and then some that was a good answer
Author:  Namis [ Thu Sep 11, 2003 3:06 pm ]
Post subject:  Rand.Real
Couldnt you just use

randint(X,X) ???
Author:  krishon [ Thu Sep 11, 2003 4:25 pm ]
Post subject: 
i think that's just for integers....
Author:  Tony [ Thu Sep 11, 2003 4:44 pm ]
Post subject: 
it is... Rand.Int() actually uses Rand.Real() function inside itself to come up with an int.

:


You can syndicate this boards posts using the file backend.php or view the topic map using sitemap.php.

Terms of Use | Privacy Policy