C++ threads with lambda expression

threads.cxx

#include <iostream>
#include <thread>
#include <vector>
#include <unistd.h> // For sleep()

using namespace std;

void blaat(unsigned int t) {
  cout << "Received param: " << t << endl;
}

int main() {
  unsigned int m_threads = 10;

  unsigned int points[m_threads];
  for (unsigned int t = 0; t < m_threads; t++) {
    points[t] = t;
  }

  std::vector<std::thread> threadList(m_threads);

  for (unsigned int t = 0; t < m_threads; t++) {
    threadList[t] = std::thread(
      [&points](const unsigned int x) {
        blaat(x);
        points[x] *= 2;
        sleep(1);
      },
    t);
  }

  for (auto& t : threadList)
    t.join();

  for (unsigned int t = 0; t < m_threads; t++) {
    cout << "Point value: " << points[t]  << endl;
  }

  return 0;
}