indefinite number of datapoints question

Code:

---

struct intArray(int size)
{
    switch (size)
    {
        case 1: { int a0; break; }
        case 2: { int a0, a1; break;}
        case 3: { int a0, a1, a2; break; }
    }
};

---

Is there a way to keep specifying member variables in this fashion without specifying a definite number of possible variables?

For example, when size is 250 I want 250 variables (a0 - a249).

I realize this looks like a simple array of integers, but for my purposes an array won't work.

look up vector. It's an STL template class that stores a variable number of any type.