public member function
<random>
std::subtract_with_carry_engine::operator()result_type operator()();
Generate random number
Returns a new random number.The function advances the internal state by calling its transition algorithm which applies a subtract-with-carry operation on the state sequence element.
Its generation algorithm is a direct copy of the value generated with the transition algorithm.
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// subtract_with_carry::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();
std::subtract_with_carry_engine<unsigned,24,10,24> generator (seed);
std::cout << "Random value: " << generator() << std::endl;
return 0;
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