public member function
<random>
std::shuffle_order_engine::operator()result_type operator()();
Generate random number
Returns a new random number.The engine's transition algorithm picks a value in the internal table (which is returned by the function) and replaces it with a new value obtained from its base engine.
The generation algorithm simply returns the value picked.
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// shuffle_order_engine::operator()
#include <iostream>
#include <chrono>
#include <random>
int main ()
{
// obtain a seed from the system clock:
unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
// knuth_b is a standard shuffle_order_engine type:
std::knuth_b generator (seed);
std::cout << "Random value: " << generator() << std::endl;
return 0;
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