sample()

#include <algorithm> (seit C++17)

Out sample (In first, In last, Out first2, N n, UniformRandomBitGenerator zufall)  // C++17
 
Out ranges::sample (Range r, Out first2, N n, UniformRandomBitGenerator zufall)
Out ranges::sample (In first, In last, Out first2, N n, UniformRandomBitGenerator zufall)

Liefert n Werte aus dem Bereich [first,last) in zufälliger Folge.

Rückgabewert: Ende des Ausgabebereiches.

shuffle(), sort().

sample.cpp

// adapted from cppref>cpp/cpp/algorithm/sample
 
#include <algorithm>
#include <ctime>
#include <iostream>
#include <iterator>
#include <random>
#include <string>
 
int main()
{
  std::string in = "abcdefgh", out;
  // auto rng = std::mt19937{std::random_device{}()}; 
  auto rng = std::mt19937(time(NULL)); // no truly random_device on MinGW implementation 
  std::sample(in.begin(), in.end(), std::back_inserter(out), 5, rng);
  std::cout << "five random letters out of " << in << " : " << out << '\n';
}