Question : How to choose numbers random with C?

Hi,

A number between 1 and 15 should be choosen random in C. The choice will be repeated 15 times in one game.

It should also be possible to repeat the game a few times without repeating a sequence.

In C I just know int rand(void). But I do not see the possibility to limit the numbers to be choosen from 1 to 15.

I also do not see the possibility to avoid the repetition of the numbers sequence for a few times.

Could somebody help me?

Many thanks and have a nice day!

Answer : How to choose numbers random with C?

>> In C I just know int rand(void).

That's a good start.

>> But I do not see the possibility to limit the numbers to be choosen from 1 to 15.

rand returns a number between 0 and RAND_MAX. If you want to limit the range to a pre-specified one, there's an easy way to do that. You can generate a random number between x and y (x inclusive) like this :

        x + (rand() % (y - x))

so, for values from 1 .. 15 :

        1 + (rand() % 15)

>> I also do not see the possibility to avoid the repetition of the numbers sequence for a few times.

If you don't want repetition, you'll have to keep track of the values that have already been generated, and if one is generated again, just generate another one.