How to declare an array of floats as a class variable in Objective-C when the dimension is undefined at the class instantiation time?

Question

In Java, it would look like this:

class Foo
{
  float[] array;
}

Foo instance = new Foo();
instance.array = new float[10];

Answer 1

You can just use a pointer:

float *array;
// Allocate 10 floats -- always remember to multiple by the object size
// when calling malloc
array = (float *)malloc(10 * sizeof(float));
...
// Deallocate array -- don't forget to do this when you're done with your object
free(array);

If you're using Objective-C++, you could instead do:

float *array;
array = new float[10];
...
delete [] array;