Clasp::RNG Class Reference

A very simple but fast Pseudo-random number generator. More...

#include <misc_types.h>

Collaboration diagram for Clasp::RNG:

Public Member Functions
	RNG (uint32 seed=1)
void	srand (uint32 seed)
	Sets the starting point for random-number generation. More...
uint32	rand ()
	Generates a pseudorandom number. More...
double	drand ()
	random floating point number in the range [0, 1.0) More...
unsigned	irand (unsigned max)
	random number in the range [0, max) More...
uint32	seed () const
uint32	operator() (unsigned max)
uint32	operator() ()

Detailed Description

A very simple but fast Pseudo-random number generator.

Note

This class is a replacement for the standard rand-function. It is provided in order to get reproducible random numbers among different compilers.

Constructor & Destructor Documentation

Clasp::RNG::RNG ( uint32  seed = 1 )

inlineexplicit

Member Function Documentation

double Clasp::RNG::drand ( )

inline

random floating point number in the range [0, 1.0)

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unsigned Clasp::RNG::irand ( unsigned  max )

inline

random number in the range [0, max)

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uint32 Clasp::RNG::operator() ( unsigned  max )

inline

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uint32 Clasp::RNG::operator() ( )

inline

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uint32 Clasp::RNG::rand ( )

inline

Generates a pseudorandom number.

The rand function returns a pseudorandom integer in the range 0 to 32767 Use the srand function to seed the pseudorandom-number generator before calling rand.

uint32 Clasp::RNG::seed ( ) const

inline

void Clasp::RNG::srand ( uint32  seed )

inline

Sets the starting point for random-number generation.

The function sets the starting point for generating a series of pseudorandom integers. To reinitialize the generator, use 1 as the seed argument. Any other value for seed sets the generator to a random starting point. Calling rand() before any call to srand() generates the same sequence as calling srand() with seed passed as 1.

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

• /Users/danielbaeck/Dropbox/Uni Klagenfurt/Diplomarbeit/gringo44/libclasp/clasp/util/misc_types.h