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  1. #include <future>
  2. #include <iostream>
  3. #include <vector>
  4.  
  5.  int main() {
  6.    std::vector<std::future<int>> futures;
  7.  
  8.    for(int i = 0; i < 4; ++i) {
  9.      futures.emplace_back (std::async(
  10. 		std::launch::async,[](int a,int b){return a*b;}, i,i));
  11.    }
  12.  
  13.   double r;
  14.   for(auto &e : futures) {
  15. 	auto temp = e.get();
  16.     std::cout << temp << std::endl;
  17.     r +=temp;
  18.    }
  19.    std::cout<<r<<std::endl;
  20.    return 0;
  21.  }
  22.  
Success #stdin #stdout 0s 36200KB
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https://ideone.com/yiAQzW
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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