LatCommon::Random Class Reference

This class generates random numbers (in fact pseudo-random numbers). More...

#include <Random.h>

Public Member Functions
	Random ()
	Constructor using a default seed for the generator. More...
	~Random ()
	Destructor.
double	randU01 ()
	Returns a random number in \([0, 1)\). More...
int	randInt (int i, int j)
	Return a random integer in \([i, j]\). More...
unsigned long	randBits (int s)
	Returns random blocks of \(s\) bits ( \(s\)-bit integers).
void	setSeed (unsigned long seed)
	Sets the seed of the generator. More...

Detailed Description

This class generates random numbers (in fact pseudo-random numbers).

The generator used is the 64-bits generator LFSR258 from L'Ecuyer [14] with period length near \(2^{258}\) for 64-bits machines, and the 32-bits generator LFSR113 from L'Ecuyer [14] with period length near \(2^{113}\) on 32-bits machines. Thus the random numbers generated will be different on 32-bits and 64-bits machines.

Constructor & Destructor Documentation

LatCommon::Random::Random

(

)

Constructor using a default seed for the generator.

One may reset the seed by calling setSeed.

Member Function Documentation

int LatCommon::Random::randInt	(	int	i,
		int	j
	)

Return a random integer in \([i, j]\).

The numbers \(i\) and \(j\) can occur. Restriction: \(i < j\).

double LatCommon::Random::randU01

(

)

Returns a random number in \([0, 1)\).

The number has 53 random bits of resolution on 64-bits machines, and 32 random bits on 32-bits machines.

void LatCommon::Random::setSeed

(

unsigned long

seed

)

Sets the seed of the generator.

If not called, a default seed is used.

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The documentation for this class was generated from the following file:

• latcommon/include/latcommon/Random.h