source: trunk/source/global/HEPRandom/test/G4ShootBitTest.cc @ 1347

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// $Id: G4ShootBitTest.cc,v 1.7 2006/06/29 19:00:58 gunter Exp $
// GEANT4 tag $Name: geant4-09-04-ref-00 $
//
// 

// Tests RandFlat::fireBit() member function
// Peter Urban, 5th Sep 1996

#include "G4ios.hh"
#include <iomanip>
#include "Randomize.hh"
#include "G4Timer.hh"

int main()
{
  HepRandomEngine* e= HepRandom::getTheEngine();
  RandFlat r(*e);
  
  const long NumTest= 10000;  

  G4cout << "Printed value: (relative frequency - probability)" << G4endl;
  G4cout << NumTest << " random numbers" << G4endl << G4endl;

  long sum= 0;
  long i, j;

  for (i=0; i<NumTest; i++) {
    sum+= r.fireBit();
  }
  G4cout << "fireBit                   " << double(sum)/NumTest-0.5 << G4endl;  
  sum= 0;
  for (i=0; i<NumTest; i++) {
    sum+= r.shootBit();
  }
  G4cout << "shootBit                  " << double(sum)/NumTest-0.5 << G4endl;  
  sum= 0;
  for (i=0; i<NumTest; i++) {
    sum+= r.shootBit(e);
  }
  G4cout << "shootBit(engine)          " << double(sum)/NumTest-0.5 << G4endl;  

 
  const long Num= 1000000;
  int iii;  long lll;

  G4Timer theTimer;
  G4cout << G4endl << "Performance test: " << G4endl;

  G4cout << "shootBit() vs G4UniformRand()<0.5: ";
  theTimer.Start();
  for (i=0; i<Num; i++)
    iii = RandFlat::shootBit();
  theTimer.Stop();
  G4cout << theTimer.GetUserElapsed() << " vs ";
  theTimer.Start();
  for (i=0; i<Num; i++)
    G4UniformRand()<0.5;
  theTimer.Stop();
  G4cout << theTimer.GetUserElapsed() << G4endl << G4endl;
  
  return 0;
}