Shulou(Shulou.com)06/02 Report--

This article will explain in detail how C++ generates random numbers. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

C library pseudorandom number generator

Rand

Srand

Most of the time it takes time to generate the seed of the random generator

Int GetRandomNum (int min, int max,int seed)

{

/ / srand ((unsigned) time (NULL)); / / generate seed

Srand (seed)

Return (rand ()% (max-min) + min)

}

Pseudorandom number generator introduced by cymbal 11. Random numbers are abstracted into two parts: random number engine and distribution. The engine is used to generate random numbers, and the distribution produces random numbers with a specific distribution.

The commonly used one is linear uniform distribution.

Uniform_int_distribution

Uniform_real_distribution

Std::random_device rd;// to generate a random number as a seed

Std::uniform_int_distribution uni_dist (0, 9999999); / / Random number generators in a specified range

Std::cout (std::uniform_int_distribution

(0, maxRand))

Rand0Engine = make_shared (rd ())

Ranlux48Engine = make_shared (rd ())

}

Std::random_device rd

Std::shared_ptr mtEngine;//32-bit Mersenne Twister by Matsumoto and Nishimura, 1998

Std::shared_ptr mtEngine64; / / 64-bit Mersenne Twister by Matsumoto and Nishimura, 2000 (Matset rotation algorithm)

Std::shared_ptr rand0Engine

Std::shared_ptr ranlux48Engine

Std::shared_ptr > dist

}

Int main ()

{

Cout

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