[skoczymroczny]

"C does not have an support for accessing the length of an array once it is created"

Well, there is sizeof(array)/sizeof(array[0])

[cluoma]

This only works for arrays allocated on the stack, not for heap-allocated arrays via malloc or similar.

[uryga]

I remember trying that, and I think it only works in the scope where you declared the array. So for example if you pass the array to a function, the size info is lost. Might be because of the "arrays decay to pointers" thing

[kbart]

It works, but keep in mind that arrays != pointers.