C++ Pointers and Memory Allocation Quandry

Hello /prog/, I have a minor problem with C++.

I'm trying to do this:

void* ReadData(float** array, int length){
*array = new float[length];
};

I call:

ReadData(&my_array, 1234);

..but when I try to read the values I get junk.

printf("%f\n", my_array[0]);

I've tried allocating the memory before passing the pointer to the function but it just doesn't care and kills whatever data I was working with.

I've tried pretty much every trick I know aside from a global variable or taking my code out of a function entirely.

Halp?

>>12
test[0] actually comes up with accurate data... but the rest is junk just like before.
That's strange.
Are you sure that the problem is ReadFloatArray and not something else?