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;
}