4 random numbers that occur once

[Thomy20]

Hello

I have a problem.

For school a need to make the game Mastermind in Labview.

The problem is that i need to have 4 random integer numbers between 0 and 5, placed in an array.

Well that is not so difficult, but the number may not be the same.

Can anyone help me?

[chrisger]

hi there

well:

1. create an array R = {0,1,2,3,4,5} (all valid numbers). use a for loop with autoindexing to do this
2. create a random number i_1 between 0 and 5
3. extract R[i_1]. that's your first random number
4. replace R[i_1] with R[5]
5. create a random number i_2 between 0 and 4
6. extract R[i_2]. that's your second random number
...

repeat the whole thing until R is empty 

Have fun!

[Chaos]

You might also use the Unique Numbers and Multiplicity VI to determine if there are duplicates on the back end.  If so force a reroll of all numbers.

See attached example...

[Ray.R]

also pay attention to the random number seed.  It is typically time based.  Therefore, if you run your loop too quickly, it will duplicate the numbers.  I seem to recall seeing a method to change the seed.  What you could do is create your own formula which uses time and the loop number (# of iteration) as a seed for the random number.. This would require some additional steps, but would ensure uniqueness of each number.

Did you do a search on random numbers? There was a similar discussion earlier this year on the topic.  I will look for the thread.

JLV

[Ray.R]

Hi Thomy,

Actually, the thread I was referring to is for CVI.  However, I am posting it for your reading pleasure 😉

Enjoy:

http://forums.ni.com/ni/board/message?board.id=180&message.id=14470&query.id=0#M14470

JLV

😄