discard_block::base_type

選擇性引擎的型別。

typedef Engine base_type;

備註

基底型別(Base Type)為基礎的引擎物件型別的一個同義資料表。

範例

 

// std_tr1__random__discard_block_base_type.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); 
    } 
 

需求

標題: <random>

命名空間: std

請參閱

參考

<random>

discard_block Class