# Random Number Generators [Random Number Generation]

Collaboration diagram for Random Number Generators:

## Typedefs

• typedef linear_congruential
< unsigned long, 48271, 0, 2147483647 > std::minstd_rand
• typedef linear_congruential
< unsigned long, 16807, 0, 2147483647 > std::minstd_rand0
• typedef mersenne_twister
< unsigned long, 32, 624, 397, 31, 0x9908b0dful, 11, 7, 0x9d2c5680ul, 15, 0xefc60000ul, 18 > std::mt19937
< subtract_with_carry
< unsigned long,(1UL<< 24), 10, 24 >, 223, 24 > std::ranlux3
< subtract_with_carry_01
< float, 24, 10, 24 >, 223, 24 > std::ranlux3_01
< subtract_with_carry
< unsigned long,(1UL<< 24), 10, 24 >, 389, 24 > std::ranlux4
< subtract_with_carry_01
< float, 24, 10, 24 >, 389, 24 > std::ranlux4_01
• typedef subtract_with_carry_01
< double, 48, 5, 12 > std::ranlux64_base_01
• typedef subtract_with_carry_01
< float, 24, 10, 24 > std::ranlux_base_01

## Detailed Description

These classes define objects which provide random or pseudorandom numbers, either from a discrete or a continuous interval. The random number generator supplied as a part of this library are all uniform random number generators which provide a sequence of random number uniformly distributed over their range.

A number generator is a function object with an operator() that takes zero arguments and returns a number.

A compliant random number generator must satisfy the following requirements.
 To be documented.

## Typedef Documentation

 typedef linear_congruential std::minstd_rand

An alternative LCR (Lehmer Generator function) .

Definition at line 509 of file tr1_impl/random.

 typedef linear_congruential std::minstd_rand0

The classic Minimum Standard rand0 of Lewis, Goodman, and Miller.

Definition at line 504 of file tr1_impl/random.

 typedef mersenne_twister< unsigned long, 32, 624, 397, 31, 0x9908b0dful, 11, 7, 0x9d2c5680ul, 15, 0xefc60000ul, 18 > std::mt19937

The classic Mersenne Twister.

Reference: M. Matsumoto and T. Nishimura, "Mersenne Twister: A 623-Dimensionally Equidistributed Uniform Pseudo-Random Number Generator", ACM Transactions on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.

Definition at line 691 of file tr1_impl/random.

 typedef discard_block< subtract_with_carry, 223, 24 > std::ranlux3

James's luxury-level-3 integer adaptation of Luescher's generator.

Definition at line 1254 of file tr1_impl/random.

 typedef discard_block< subtract_with_carry, 389, 24 > std::ranlux4

James's luxury-level-4 integer adaptation of Luescher's generator.

Definition at line 1263 of file tr1_impl/random.

Generated on Thu Jul 23 21:16:41 2009 for libstdc++ by  1.5.8