I try to create a variable to get value random with drand48 () but in each run my variable take a same value .
can anybody help me , (i want in each run my variable take different value) ???
let number = drand48 ()
drand48 creates a sudo-random number sequence. That is if it is not set to a different start point each time it will always produce the same numbers.
To fix this call srand48 beforehand to set a new start point for drand48
let time = UInt32(NSDate().timeIntervalSinceReferenceDate) srand48(Int(time)) let number = drand48 ()
Here are the docs for drand48 and srand48
Edit: different way to seed to avoid the error, I'm not by a computer (on my phone) so may have to fix it later if it doesn't work