RWRandGenMCG31M1 Class Reference

Generates random numbers uniformly distributed over the interval [0, 1]. More...

#include <rw/randmcg31m1.h>

Inheritance diagram for RWRandGenMCG31M1:

Public Member Functions
	RWRandGenMCG31M1 ()
	RWRandGenMCG31M1 (unsigned long seed)
	RWRandGenMCG31M1 (const RWRandGenMCG31M1 &u)
double	operator() ()
RWRandGenMCG31M1 &	operator= (const RWRandGenMCG31M1 &u)
Public Member Functions inherited from RWRandGenBasicMLC
void	printOn (std::ostream &s) const
void	restoreFrom (RWFile &file)
void	restoreFrom (RWvistream &s)
void	saveOn (RWFile &file) const
void	saveOn (RWvostream &s) const
void	scanFrom (std::istream &s)

Additional Inherited Members
Related Functions inherited from RWRandGenBasicMLC
std::ostream &	operator<< (std::ostream &s, const RWRandGenBasicMLC &gen)
std::istream &	operator>> (std::istream &s, RWRandGenBasicMLC &gen)

Detailed Description

Class RWRandGenMCG31M1 generates random numbers uniformly distributed over the interval [0, 1], and may be used instead of class RWRandGenerator as a template parameter to any of the distribution generators derived from abstract base class RWTRand.

RWRandGenMCG31M1 is a 31-bit multiplicative congruential generator.

\[ \begin{align} x_n &= ax_{n-1}(\bmod m)\\ u_n &= x_{n}/m\\ a &= 1132489760, m = 2^{31 - 1} \end{align} \]

Unlike RWRandGenerator, each instance of RWRandGenMCG31M1 contains and maintains its own, independent state. This can make it easier to use in some situations. The "internal state" of an instance of RWRandGenMCG31M1 consists of only a seed.

Synopsis

#include <rw/randmcg31m1.h>
RWRandGenMCG31M1 gen;

Constructor & Destructor Documentation

RWRandGenMCG31M1::RWRandGenMCG31M1

(

)

Constructs a generator, arbitrarily seeded by a call to the time() function.

RWRandGenMCG31M1::RWRandGenMCG31M1

(

unsigned long

seed

)

Constructs a generator with a specified seed.

RWRandGenMCG31M1::RWRandGenMCG31M1 ( const RWRandGenMCG31M1 &  u )

inline

Constructs a copy of u. The copy's state will equal the state of u at the time the copy is created, but will not share the state of u.

Member Function Documentation

double RWRandGenMCG31M1::operator() ( )

virtual

Returns a random double in [0,1].

Implements RWRandGenBasicMLC.

RWRandGenMCG31M1& RWRandGenMCG31M1::operator= ( const RWRandGenMCG31M1 &  u )

inline

Assigns a copy of u to self. The copy's state will equal the state of u at the time the copy is created, but will not share the state of u.