Define your own ostream variable : ostream « File Stream « C++ Tutorial

1. C++ Tutorial
2. File Stream
3. ostream

#include<iostream.h>
ostream & setthex(ostream & stream)
{
  stream.setf(ios::hex|ios::uppercase|ios::showbase);
  return stream;
}
ostream & reset(ostream & stream)
{
  stream.unsetf(ios::hex|ios::uppercase|ios::showbase);
  return stream;
}
main()
{
  cout<<setthex<<200<<'\n';
  cout<<reset<<200<<'\n';
  return 0;
}

200
200