#include <iostream>
#include <cmath>
#include <iomanip>

int main() {

  cout << "Precision(6): " << endl
       << sqrt(2.0) << endl;
  cout << sqrt(5.0) << endl << endl;

  cout.precision(12);
  cout << "Precision(12): " << endl
       << sqrt(2.0) << endl;
  cout << sqrt(5.0) << endl << endl;

  cout << "Precision(3): " << setprecision(3) << endl
       << sqrt(2.0) << endl;
  cout << sqrt(5.0) << endl;

  cout << endl << "********************************************************"
       << endl << endl;
       
#if 0
  cout << "Scientific: " << scientific << 100.0 << endl
       << "Fixed decimal: " << fixed << 100.0 << endl;

  cout << "Scientific: " << scientific << sqrt(2.0) << endl
       << "Fixed decimal: " << fixed << sqrt(2.0) << endl;

  cout << endl << "********************************************************"
       << endl << endl;
#endif

  int n = 27;
  double d = 8.56;

  cout << "n = ";
  cout.width(12);
  cout << n << endl;
  cout << "d = ";
  cout.width(12);
  cout << d << endl << endl;

  cout.width(12);
  cout << "n = " << n << endl << endl;

  cout << "n = " << setw(12) << n << endl
       << "d = " << setw(12) << d << endl;

  return 0;
}