variate_generator::operator()

返回一个任意值。

result_type operator()();
template<class T>
    result_type operator()(T value);

参数

• T
  引擎参数的类型。

• The engine argument.
  value

备注

第一个成员函数返回 dist(wr_eng)，wr_eng 是对象的包装引擎。

第二个成员函数返回 dist(wr_eng, value)，wr_eng 是对象的包装引擎。

示例

// std_tr1__random__variate_generator_operator_fn.cpp 
// compile with: /EHsc 
#include <random> 
#include <iostream> 
 
typedef std::minstd_rand Myeng; 
typedef std::uniform_int<unsigned int> Mydist; 
typedef std::variate_generator<Myeng, Mydist> Myceng; 
int main() 
    { 
    Myeng eng0; 
    Mydist dist0; 
    Myceng ceng(eng0, dist0); 
    const Myceng::engine_type& eng = ceng.engine(); // get base engine 
    const Myceng::distribution_type& dist = 
        ceng.distribution(); // get distribution 
    Myceng::result_type compval = ceng(); 
 
    compval = compval;  // to quiet "unused" warnings 
    eng.min(); 
    dist.min(); 
 
    std::cout << "min == " << ceng.min() << std::endl; 
    std::cout << "max == " << ceng.max() << std::endl; 
 
    std::cout << "a random value == " << ceng() << std::endl; 
    std::cout << "a random value == " << ceng() << std::endl; 
    std::cout << "a random value == " << ceng() << std::endl; 
 
    return (0); 
    } 
 

要求

标头: <random>

命名空间: std

请参见

参考

<random>

variate_generator Class