Question

Ok, this is so impossible that I don’t really know how to ask. I’m developing an iPhone app, and at one point I needed to use NSOperation for some background task. The problem is that even the simplest float calculation it’s trimmed after the point (eg 1/2= 1.0). Initially I thought that’s a concurrency problem but then I tried:

NSLog(@"%f", 1/2);

And it logged 1.00000. How is this even possible? Surely I do something wrong!

Any ideas anyone?

Answer 1

You are dividing two integers, which then rounds up to 1.
If you want to divide two floating point variables, either first save the values into a float and divide it or write .0f at the end of your value to tell the compiler that you are working with a float. Eg: 1.0f / 2.0f

Just writing 1.0 / 2.0 like suggested in the comments will result in a division of two doubles, as the compiler will default the values to double.