Something really dumb with return values

Question

I'm doing something really dumb, and I don't see it.

I've got an object doc with a method:

-(float) currentOrient
{
    return 50.5;
}

In another object, I call:

-(void) showPage
{

    float rot2=0;
    rot2 = [doc currentOrient] ;
    NSLog(@"SP rotation is %.2f", rot2);
}

However, the output is :

SP rotation is 1112145920.000000

No, one question is "Why is the %2f not formatting correctly?" But the more confusing question is "Where is that number coming from?" Yes, I've walked through it with a debugger, the value of rot DOES change from the garbage it starts with. and that number DOES appear to be consistent.

Clearly something really dumb is going on...

Answer 1

I can answer the first question:

Why is the %2f not formatting correctly?

Because it ought to be %1.2f to round to two decimal places (which I believe is what you're trying to achieve?)

And guess at the second:

Do you have a property named rot in the code? Other than that... shrug... I don't know - I'm assuming you've simplified the example to post on SO, have you taken out other code that may be relevant? Based on the information you've provided everything should be ducky.

On a side note: When I hit bugs like this I go do something physical. Usually when I come back my head is clear and I find the problem immediately. You might want to give that a try too! :D

Answer 2

It sounds like the showPage method doesn't know right return type for currentOrient, so it's interpreting the value returned as an int and casting that nonsensical int to a float. Are you getting any warnings? Are you sure you're importing the header for currentOrient correctly? Is the currentOrient method declared correctly?