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fsd · Guest

I have three numbers - 1, 2 & 3.

A randomly selected one of the three are stored in 'var1', and another
randomly selected one is in 'var2'.

How do I find out the number that is left over?

I tried a while loop but I couldn't get it to work...

TIA

Joseph Dionne · Guest

fsd wrote:

Nicholas Paldino [.NET/C# · Guest

fsd,

What I would do is store the values in an ArrayList. When you pick the
numbers randomly, remove them from the ArrayList and place into a new
collection. This would require you to change the range of selected random
numbers every time (the first time you pick a random number from the range
1-3, then 1-2, etc, etc). You just have to stop when you have enough
numbers selected. Then, whatever is left over in the ArrayList is what was
not selected.

Hope this helps.

--
- Nicholas Paldino [.NET/C# MVP]
- [email]mvp (AT) spam (DOT) guard.caspershouse.com[/email]

"fsd" <sg (AT) hotmial (DOT) com> wrote

Dmitriy Lapshin [C# / .NE · Guest

Something like this (pseudo-code):

var1 = Random(3);
var2 = Random(3);
while (var2 == var1)
{
var2 = Random(3);
}

--
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio
http://x-unity.miik.com.ua/teststudio.aspx
Bring the power of unit testing to VS .NET IDE

"fsd" <sg (AT) hotmial (DOT) com> wrote

Eric Sosman · Guest

fsd wrote:

Marco Martin · Guest

try this;

int nArrayPos = -1;
for(int x = 0; x < arrayOfVars.Length; x++)
{
if(var1 != arrayOfVars[x] & var2 != arrayOfVars[x])
{
nArrayPos = x;
}
}
if(nArrayPos != 01)
MessageBox.Show(arrayOfVars[x].ToString() + " is not beeing used");

"fsd"

fsd · Guest

"Sudsy" <bitbucket44 (AT) hotmail (DOT) com> wrote

Marco Martin · Guest

Sorry, the last if should have been;

if(nArrayPos != -1)

"Marco Martin" <marco_martin (AT) sympatico (DOT) ca> wrote

Brad BARCLAY · Guest

fsd wrote:

Eric Johannsen · Guest

Unless I'm missing something, this would not work because theoretically you
could get "1" as your answer every time...and that would be stored in each
element of the array list.

Eric

"Nicholas Paldino [.NET/C# MVP]" <mvp (AT) spam (DOT) guard.caspershouse.com> wrote in
message news:#r#RzAXyDHA.1744 (AT) TK2MSFTNGP12 (DOT) phx.gbl...

Nicholas Paldino [.NET/C# · Guest

Eric,

That's not what I meant. The array list would be populated with values,
but not randomly. It would be populated with the set of values to select
from (however one comes to those values is irrelevant). Then, a random
number between 0 and the length of the array - 1 is chosen, representing the
index that the value selected is at. That value is placed in another
collection, and the element at that index is removed from the original set.
This reduces the length by one. Even if one is selected every time, it
works because the elements are shifted down one with each removal, providing
a different value.

--
- Nicholas Paldino [.NET/C# MVP]
- [email]mvp (AT) spam (DOT) guard.caspershouse.com[/email]

"Eric Johannsen" <nospam-news (AT) johannsen (DOT) us> wrote

Alex Hunsley · Guest

fsd wrote:

Walter Mitty · Guest

"fsd" <sg (AT) hotmial (DOT) com> brightened my day with his incisive wit when in
news:bs9p1f$b81nj$1 (AT) ID-83837 (DOT) news.uni-berlin.de he conjectured that: