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  1. #include <memory>
  2. #include <iostream>
  3.  
  4. auto counter() {
  5.     int i = 0;
  6.     return [i = std::make_shared<int>( i ) ] {
  7.         return ++(*i);
  8.     };
  9. }
  10.  
  11. int main() {
  12.     auto f = counter();
  13.     auto g = counter();
  14.  
  15.     int arr[] = {
  16.        f(),
  17.        g(),
  18.        g(),
  19.        f()
  20.     };
  21.  
  22.     for( auto i : arr ) {
  23.         std::cout << i << '\n';
  24.     }
  25. }
  26.  
Success #stdin #stdout 0s 3228KB
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stdin 
Standard input is empty
stdout 
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https://ideone.com/SrS0pL
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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