Beispiel:

#include <iostream.h>
#include <iomanip.h>

main()
{
  int c = 27, d = 26;
  float f = 3.1415927872;

  cout << setw(15) << "Hexadezimal: " 
       << setfill('#') << setw(10) 
       << hex << c
       << "," << setw(8) 
       << d << endl;

  cout << setw(15)  << setfill(' ')
       << "Float: " << setfill('.')
       << setw(10)  << setprecision(2)
       << f << endl;
}

Ausgabe:
  Hexadezimal: ########1b,######1a
        Float: .......3.1