Gabriele Cosmo
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4ShootBitTest.cc,v 1.4 1999/12/15 14:50:29 gunter Exp $
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// GEANT4 tag $Name: geant4-01-01 $
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//
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//
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// Tests RandFlat::fireBit() member function
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// Peter Urban, 5th Sep 1996
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#include "G4ios.hh"
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#include "g4std/iomanip"
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#include "Randomize.hh"
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#include "G4Timer.hh"
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int main()
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{
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HepRandomEngine* e= HepRandom::getTheEngine();
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RandFlat r(*e);
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const long NumTest= 10000;
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G4cout << "Printed value: (relative frequency - probability)" << G4endl;
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G4cout << NumTest << " random numbers" << G4endl << G4endl;
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long sum= 0;
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long i, j;
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for (i=0; i<NumTest; i++) {
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sum+= r.fireBit();
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}
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G4cout << "fireBit " << double(sum)/NumTest-0.5 << G4endl;
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sum= 0;
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for (i=0; i<NumTest; i++) {
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sum+= r.shootBit();
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}
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G4cout << "shootBit " << double(sum)/NumTest-0.5 << G4endl;
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sum= 0;
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for (i=0; i<NumTest; i++) {
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sum+= r.shootBit(e);
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}
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G4cout << "shootBit(engine) " << double(sum)/NumTest-0.5 << G4endl;
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const long Num= 1000000;
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int iii; long lll;
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G4Timer theTimer;
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G4cout << G4endl << "Performance test: " << G4endl;
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G4cout << "shootBit() vs G4UniformRand()<0.5: ";
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theTimer.Start();
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for (i=0; i<Num; i++)
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iii = RandFlat::shootBit();
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theTimer.Stop();
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G4cout << theTimer.GetUserElapsed() << " vs ";
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theTimer.Start();
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for (i=0; i<Num; i++)
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G4UniformRand()<0.5;
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theTimer.Stop();
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G4cout << theTimer.GetUserElapsed() << G4endl << G4endl;
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return 0;
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}
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