1. cin >> ::host; 2. void main () { bookstore *tag = new bookstore; tag->cost = 49.95; delete tag; } 3. void main () { cout << "How many videotapes are there?" << endl; int numVideotapes; cin >> numVideotapes; int *videotape = new int[numVideotapes]; for (int i = 0; i < numVideotapes; i++) cin >> videotape[i]; delete[] videotape; }