Please can anyone help me with this: so i was trying

Question

Please can anyone help me with this: so i was trying

to learn data structures and i was at this stack implementation
class Stack {
int top;

public:
int a[MAX]; // Maximum size of Stack

Stack() { top = -1; }
bool push(int x);
int pop();
int peek();
bool isEmpty();
};

and it says top=-1 , so does it mean Base Address of your Array a + (-1 * size of(data type for array a))

but what if that address has a char and not an integer?