type error after dereferencing pointer arithmetic?

Question

I'm curious as to why the following code doesn't work. In particular, the compiler seems to be viewing *(result + i) as a gVector3 type as opposed to a float. But result is a pointer to a float array right? So wouldn't dereferencing a pointer return a float? You can assume that gVector3 and gMatrix3 are defined.

    /* returns the column vector at index i */
    gVector3 gMatrix3::getColumn(unsigned int index) const{
    gVector3* result = new gVector3();
        for (int i = 0; i < 3; i++){
            *(result + i) = data[i][index];
        }
        return *result;
    }

Answer 1

If gVector3 is a class, then it probably overloads operator[] , which is what you should use. Otherwise you're performing pointer arithmetic on the object itself. Try this:

(*result)[i] = data[i][index];