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std::poisson_distribution::poisson_distribution

STD：：Poisson[医]分布：：Poisson[医]分布

explicit poisson_distribution( double mean = 1.0 (1)(since C++11)
explicit poisson_distribution( const param_type& params (2)(since C++11)

构造一个新的分发对象。第一个版本使用mean作为分发参数，第二个版本使用params作为分布参数。

参数

mean-the μ distribution parameter (the mean of the distribution)
params-the distribution parameter set

注记

要求0<平均值。

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