Generating a random number in SML

问题

How can you generate a random number from a specific range, for example the integer 34 in the range [1, 100]?

I looked at the Random structure but it doesn't give me what I want, at least from what I can understand.

回答1:

I think you have to use the Random structure in the given link like this ...

- val nextInt = Random.randRange (1,100);
- val r = Random.rand (1,1);
- val x1 = nextInt r;
- val x2 = nextInt r;

回答2:

To get 34 integers between 1 and 100, you could use:

let
    val seed = Random.rand (123,456)
in
    List.tabulate(34, fn i => Random.randRange (1,100)  seed)
end;

Note that the value seed is a reference that gets updated with each call to Random.randRange.

来源：https://stackoverflow.com/questions/22067535/generating-a-random-number-in-sml