Data Structures with C++ Using STL

What is the output from the following sequence of stack operations?

stack intStack;
int x, y = 3;

intStack.push(8);
intStack.push(9);
intStack.push(y);
x = intStack.top();
intStack.pop();
intStack.push(18);
x = intStack.top();
intStack.pop();
intStackpush(22);
while (!intStack.empty())
{ y = intStack.top();
  intStack.pop();
  cout << y << " ";
}
cout << x << endl;

Please provide a complete program if it makes sense.