CS202 Java-174
Thinking in C   ©2000 MindView, Inc.
174
    public int pop() {
        if (ptr > 0)
            return data[--ptr];
        else
            return Integer.MIN_VALUE;
    }
    public int top() {
        if (ptr > 0)
            return data[ptr-1];
        else
            return Integer.MIN_VALUE;
    }
    public int size() {
        return ptr;
    }