floats default to NaN... why?

[dennis luehring]

Am 14.04.2012 06:00, schrieb F i L:
>       struct Foo {
>         int x, y;    // ready for use.
>         float z, w;  // messes things up.
>         float r = 0; // almost always...
>       }

how often in your code is 0 or 0.0 the real starting point?
i can't think of any situation except counters or something
where 0 is a proper start - and float 0.0 is in very very few cases a 
normal start - so whats your point?