How to create an array of thread objects in C++11?

Question

I want to learn how to create multiple threads with the new C++ standard library and store their handles into an array.
How can I start a thread?
The examples that I saw start a thread with the constructor, but if I use array, I cannot call the constructor.

#include <iostream> #include <thread>  void exec(int n){     std::cout << "thread " << n << std::endl; }  int main(int argc, char* argv[]){      std::thread myThreads[4];      for (int i=0; i<4; i++){         //myThreads[i].start(exec, i); //?? create, start, run         //new (&myThreads[i]) std::thread(exec, i); //I tried it and it seems to work, but it looks like a bad design or an anti-pattern.     }     for (int i=0; i<4; i++){         myThreads[i].join();     }  } 

Answer 1

Nothing fancy required; just use assignment. Inside your loop, write

myThreads[i] = std::thread(exec, i); 

and it should work.