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operators (std::poisson_distribution)

运算符<<，>%28 std：：Poisson[医]分配%29

template< class CharT, class Traits, class ResultType > std::basic_ostream& operator<<( std::basic_ostream& ost, const poisson_distribution& d (1)​
template< class CharT, class Traits, class ResultType > std::basic_istream<CharT,Traits>& operator>>( std::basic_istream<CharT,Traits>& ist, poisson_distribution<ResultType>& d (2)​

对伪随机数分布执行流输入和输出操作。d...

1%29将分布参数和内部状态的文本表示形式写入ost作为文本表征。的格式标志和填充字符。ost没有变化。

2%29通过读取数据恢复分布参数和内部状态。ist的格式标志ist没有变化。数据必须是使用具有相同区域设置的流编写的，CharT和Traits模板参数，否则行为不定义。如果遇到错误的输入，ist.setstate(std::ios::failbit)被调用，这可能会引发std::ios_base::failure...d在这种情况下是不变的。

参数

ost-output stream to insert the data to
ist-input stream to extract the data from
d-pseudo-random number distribution

返回值

1%29ost

2%29ist

例外

1%29%280%29

2%5月29日投掷std::ios_base::failure输入错误。

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