How to get lenght of a float* variable

[garea]

Hi, I have a variable like this:

float* ranges = someClass->getRanges()

and I would like to know how to get the lenght of "ranges" because "someClass" doesn't has any method to obtain this.

Could you help me, please?

Thank you!

[GCDEF]

Your question doesn't make sense to me. Does getRanges return a pointer to an array? If it does, you can't get the length of the array from a pointer. Typically you'd use output parameters when more than one return value is needed.

[Lindley]

There is no way to query the length of a raw array once it has decayed to a pointer (or if it was dynamically allocated to begin with). You need to either a) make the length an explicitly queryable value, or b) use a class which wraps the array and stores the length internally. std::vector and std::tr1::array are two such classes that are commonly used.

[garea]

Ok, i will try to modify "someClass" adding a new attribute numberOfRanges

thank you!