/* FILE: manipulators.cpp
   Examples of I/O stream manipulators

   Manipulators that don't take an arg (endl, flush, ...)
   are declared in <iostream>

   Manipulators that do take an arg (setw(), setprecision(), ...)
   are declared in <iomanip>
*/


#include <iostream>  //for manipulators taking no args
#include <iomanip>   //for parameterized manipulators
using namespace std;

const char HT = '\t';         //Horizontal Tab
int main(){
  float x = 123.456789, y = 123.0;


  //default precision: 6
  cout << "\ngeneral:    "
       << x << HT       //123.457
       << y << endl;    //123
  cout << "showpoint:  "
       << showpoint
       << x << HT       //123.457
       << y <<  endl;   //123.000
  cout << "scientific: "
       << scientific
       << x << HT       //1.234568e+02
       << y << endl;    //1.230000e+02
  cout << "fixed:      "
       << fixed
       << x << HT       //123.456787
       << y << endl;    //123.000000
  cout << "setw(12): "
       << setw(12)
       << setfill('*')
       << x << HT       //**123.456787
       << setw(12)      //setw is not persistent
       << y << endl;    //**123.000000
  //currency notation with manipulators
  cout << "currency:  " 
       << fixed << showpoint << setprecision(2)
       << "$" << x 
       << HT
       << "$" << y 
       << endl;

  //reset io flags
  resetiosflags(ios::fixed | ios::scientific | ios::showpoint );

  //currency notation using an alternate manipulator
  //see p. 96 [Hennefeld]
  cout << setiosflags(ios::fixed | ios::showpoint)
       << setprecision(2)
       << "currency:  "
       << "$" << x
       << HT 
       << "$" << y
       << endl;

  //reset io flags
  resetiosflags(ios::fixed | ios::scientific | ios::showpoint );
  //default precision: 6
  cout << "\ngeneral:    " << setprecision(6) << noshowpoint
       << x << HT       //123.457
       << y << endl;    //123

  return 0;
}