public member function
<random>
std::linear_congruential_engine::operator()result_type operator()();
Generate random number
Returns a new random number.The function advances the internal state by one, which modifies the state value with the following transition algorithm:
Where x is the current state value, a and c are their respective class template parameters, and m is its respective class template parameter if this is greater than 0, or numeric_limits<UIntType>::max() plus 1, otherwise.
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// linear_congruential_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();
std::minstd_rand0 generator (seed); // minstd_rand0 is a standard linear_congruential_engine
std::cout << "Random value: " << generator() << std::endl;
return 0;
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