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Class param_type

boost::random::negative_binomial_distribution::param_type

Synopsis

// In header: <boost/random/negative_binomial_distribution.hpp>



class param_type {
public:
  // types
  typedef negative_binomial_distribution distribution_type;

  // construct/copy/destruct
  explicit param_type(IntType = 1, RealType = 0.5);

  // public member functions
  IntType k() const;
  RealType p() const;

  // friend functions
  template<typename CharT, typename Traits> 
    friend std::basic_ostream< CharT, Traits > & 
    operator<<(std::basic_ostream< CharT, Traits > &, const param_type &);
  template<typename CharT, typename Traits> 
    friend std::basic_istream< CharT, Traits > & 
    operator>>(std::basic_istream< CharT, Traits > &, param_type &);
  friend bool operator==(const param_type &, const param_type &);
  friend bool operator!=(const param_type &, const param_type &);
};

Description

`param_type` public construct/copy/destruct

```
explicit param_type(IntType k = 1, RealType p = 0.5);
```
Construct a param_type object. k and p are the parameters of the distribution.

Requires: k >=0 && 0 <= p <= 1

`param_type` public member functions

```
IntType k() const;
```
Returns the k parameter of the distribution.
```
RealType p() const;
```
Returns the p parameter of the distribution.

`param_type` friend functions

template<typename CharT, typename Traits> 
  friend std::basic_ostream< CharT, Traits > & 
  operator<<(std::basic_ostream< CharT, Traits > & os, 
             const param_type & param);

Writes the parameters of the distribution to a std::ostream.

template<typename CharT, typename Traits> 
  friend std::basic_istream< CharT, Traits > & 
  operator>>(std::basic_istream< CharT, Traits > & is, param_type & param);

Reads the parameters of the distribution from a std::istream.

friend bool operator==(const param_type & lhs, const param_type & rhs);

Returns true if the parameters have the same values.

friend bool operator!=(const param_type & lhs, const param_type & rhs);

Returns true if the parameters have different values.