random number generation between two floats

Question

I am trying to generate a random number between two floats (the max is increased by its half)

this is what I have so far but it\'s not working

    //ra         


        

Answer 1

Include:

#define ARC4RANDOM_MAX 0x100000000

And then try this:

double val = ((double)arc4random() / ARC4RANDOM_MAX) 
   * (maxRange - minRange)
   + minRange;

Answer 2

Surely it's:

float randomNumber = ((float)arc4random() / ARC4RANDOM_MAX * (maxRange - minRange)) + minRange;