xor_combine::seed
裁剪產生器。
void seed();
template<class Gen>
void seed(Gen& gen);
參數
Engine
種子選擇性引擎的型別。eng
種子選擇性引擎。
備註
第 10% 成員函式呼叫 (Function Call) stored_eng1.seed() 然後呼叫 stored_eng2.seed()。第二 + 成成員函式呼叫 (Function Call) stored_eng1.seed(gen) 然後呼叫 stored_eng2.seed(gen)。
範例
// std_tr1__random__xor_combine_seed.cpp
// compile with: /EHsc
#include <random>
#include <iostream>
typedef std::subtract_with_carry<unsigned int,
1 << 24, 10, 24> Myeng1;
typedef std::linear_congruential<unsigned int,
16807, 0, (1U << 31) - 1> Myeng2;
typedef std::xor_combine<Myeng1, 1, Myeng2, 2> Myceng;
int main()
{
Myeng1 eng1;
Myeng2 eng2;
Myceng ceng;
const Myceng::base1_type& base1 = ceng.base1(); // get base engine
const Myceng::base2_type& base2 = ceng.base2(); // get base engine
Myceng::result_type compval = ceng();
compval = compval; // to quiet "unused" warnings
base1.min();
base2.min();
std::cout << "S1 == " << Myceng::shift1 << std::endl;
std::cout << "S2 == " << Myceng::shift2 << 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(eng1); // construct with generator
ceng2.seed(eng1); // seed with generator
return (0);
}
需求
標題: <random>
命名空間: std