C++ 표준 라이브러리를 사용하여 멀티스레딩을 구현하는 방법은 무엇입니까?

#include <thread>
#include 

using namespace std;

vector numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int num_threads = 4;

int sum(const vector& arr, int start, int end) {
  int sum = 0;
  for (int i = start; i < end; i++) {
    sum += arr[i];
  }
  return sum;
}

int main() {
  // 创建线程数组
  vector threads(num_threads);

  // 计算每个线程负责的范围
  int chunk_size = numbers.size() / num_threads;
  vector partial_sums(num_threads);

  for (int i = 0; i < num_threads; i++) {
    int start = i * chunk_size;
    int end = min((i + 1) * chunk_size, numbers.size());
    
    // 创建线程并计算部分和
    threads[i] = thread(sum, ref(numbers), start, end);
  }

  // 等待所有线程完成
  for (int i = 0; i < num_threads; i++) {
    threads[i].join();
  }

  // 计算总体和
  int total_sum = 0;
  for (int partial_sum : partial_sums) {
    total_sum += partial_sum;
  }

  cout << "Total sum: " << total_sum << endl;

  return 0;
}