How to create a random float in Objective-C?

Question

I\'m trying to create a random float between 0.15 and 0.3 in Objective-C. The following code always returns 1:

int randn = (random() % 15)+15;
float pscale =         


        

Answer 1

To add to @Caladain's answer, if you want the solution to be as easy to use as rand(), you can define these:

#define randf() ((CGFloat)rand() / RAND_MAX)
#define randf_scaled(scale) (((CGFloat)rand() / RAND_MAX) * scale)

Feel free to replace CGFloat with double if you don't have access to CoreGraphics.