RandEngine

Simple random engine using rand() and srand() functions from C standard library to implement the flat() basic distribution and for setting seeds.

Copy constructor and operator= are private for objects of this class.

Author

Gabriele Cosmo

Declaration

#include "CLHEP/Random/RandEngine.h"

class RandEngine : public HepRandomEngine

Public Member Functions

Constructors: RandEngine(); RandEngine(long seed); RandEngine(HepInt rowIndex, HepInt colIndex); RandEngine(std::istream& is)
Destructor: virtual ~RandEngine()
Conversion operator: operator unsigned int(); 32-bit flat value, quickest of all
flat: HepDouble flat(); It returns a pseudo random number between 0 and 1, according to the standard stdlib random function rand() but excluding the end points.
flatArray: void flatArray (const HepInt size, HepDouble* vect); Fills the array vect of specified size with flat random values.
restoreStatus: void restoreStatus(const char filename[] = "Rand.conf"); Reads from file Rand.conf the last saved engine status and restores it.
saveStatus: void saveStatus(const char filename[] = "Rand.conf") const; Saves on file Rand.conf the current engine status.
setSeed: void setSeed(long seed, HepInt dum=0); Sets the state of the algorithm according to seed.
setSeeds: void setSeeds(const long * seeds, HepInt dum=0); Sets the state of the algorithm according to the zero terminated array of seeds. Only the first seed is used.
showStatus: void showStatus() const; Dumps the engine status on the screen.

Non-Member Functions

<<: std::ostream & operator<< (std::ostream & os, const RandEngine & e); Output to a stream.
>>: std::istream & operator>> (std::istream & is, RandEngine & e); Input from a stream.

Example

CLHEP/test/testRandom.cc