public member function
<random>
std::extreme_value_distribution::param (1)param_type param() const;(2)
void param (const param_type& parm);
Distribution parameters
The first version (1) returns an object with the parameters currently associated with the distribution object.An extreme_value_distribution object is defined by two parameters: a and b. An object of type param_type carries this information, but it is meant to be used only to construct or specify the parameters for an extreme_value_distribution object, not to inspect the individual parameters.
To inspect the individual parameters associated to the distribution object you can use: extreme_value_distribution::a and extreme_value_distribution::b.
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// extreme_value_distribution::param
#include <iostream>
#include <random>
int main()
{
std::default_random_engine generator;
std::extreme_value_distribution<double> d1(1.0,4.0);
std::extreme_value_distribution<double> d2(d1.param());
// print two independent values:
std::cout << d1(generator) << std::endl;
std::cout << d2(generator) << std::endl;
return 0;
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