discard_block::seed

为该存储区的状态。

void seed();
template<class Gen>
    void seed(Gen& gen);

参数

• Gen
  种子生成器的类型。

• gen
  种子生成器。

备注

第一个种子函数调用 stored_eng.seed() 并将 count 为0。第二个种子函数调用 stored_eng.seed(gen) 并将 count 为0。

示例

// std_tr1__random__discard_block_seed.cpp 
// compile with: /EHsc 
#include <random> 
#include <iostream> 
 
typedef std::mt19937 Myeng; 
typedef std::discard_block<Myeng, 2, 1> Myceng; 
int main() 
    { 
    Myeng eng; 
    Myceng ceng; 
    const Myceng::base_type& base = ceng.base(); // get base engine 
    Myceng::result_type compval = ceng(); 
 
    compval = compval;  // to quiet "unused" warnings 
    base.min(); 
 
    std::cout << "P == " << Myceng::block_size << std::endl; 
    std::cout << "R == " << Myceng::used_block << std::endl; 
    std::cout << "min == " << ceng.min() << std::endl; 
    std::cout << "max == " << ceng.max() << std::endl; 
 
    ceng.seed(); // reseed base engine 
    std::cout << "a random value == " << ceng() << std::endl; 
    std::cout << "a random value == " << ceng() << std::endl; 
    std::cout << "a random value == " << ceng() << std::endl; 
 
    Myceng ceng2(eng); // construct with generator 
    ceng2.seed(eng);  // seed with generator 
 
    return (0); 
    } 
 

要求

标头: <random>

命名空间: std

请参见

参考

<random>

discard_block Class