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std::exponential_distribution::exponential_distribution

性病：指数[医]分布：：指数[医]分布

explicit exponential_distribution( RealType lambda = 1.0 (1)(since C++11)
explicit exponential_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lambda作为分发参数，第二个版本使用params作为分布参数。

参数

lambda-the λ distribution parameter (the rate parameter)
params-the distribution parameter set

注记

需要0<lambda。

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