int main() {
  Computer compute;  
  compute.setspeed(100); 
  int s = compute.readspeed();

  Computer* pCompute = &compute;
  pCompute->setspeed(5000);
  s = pCompute->readspeed();

  Computer* heapCompute = new Computer;
  heapCompute->setspeed(30000);
  s = heapCompute->readspeed();

  delete heapCompute;
  return 0;
}