more random number questions


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  1. #1
    Join Date
    Nov 2004
    Location
    Saskatchewan Canada
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    189

    Question more random number questions

    I want to generate a random number between 0 and 15, but never had the same number come up twice in a row.

    I considered it like this:

    <b>start:</b>
    <b>random rand</b> ' generate the random number
    <b>num = rand & $000F</b> ' grab that last 4 bits of the number
    <b>if num = last then start</b> ' compare the number to the previously stored number and if it is the same do it again
    <b>last = num</b> ' store the number to compare next time


    This seems like it should work, but it's not working for me. I am still getting duplicate consecutive random numbers. Is it because I am using a word to store four bits and if that is the case, what is the proper syntax to compare just 0 to 15 on those words?

    Thanks,

    Bart

  2. #2
    Join Date
    Nov 2004
    Location
    Saskatchewan Canada
    Posts
    189

    Default

    Oops. I think the problem here was more physical than coding. With all the chip removal and installing I bumped a LED lose so with that back in place and careful watching it looks like there are no duplicate numbers back to back.

    Bart

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