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  1. #include <vector>
  2.  
  3.     class TimerFriend
  4.     {
  5.     public:
  6.       TimerFriend(const TimerFriend&) = default;
  7.       TimerFriend& operator =(const TimerFriend&) = default;
  8.  
  9.     private:
  10.       TimerFriend() {}
  11.  
  12.       friend class Timer;
  13.     };
  14.  
  15.     class Timer {
  16.         private:
  17.             int timeLeft;
  18.  
  19.         public:
  20.             Timer(unsigned int ms, const TimerFriend&) : timeLeft(ms) {}
  21.  
  22.             static std::vector<Timer> instances;
  23.             static void create(unsigned int ms) {
  24.                 instances.emplace_back(ms, TimerFriend());
  25.             }
  26.     };
  27.  
  28.     std::vector<Timer> Timer::instances;
  29.  
  30. int main()
  31. {
  32.     Timer::create(100);
  33. }
Success #stdin #stdout 0s 3024KB
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https://ideone.com/LzK7e1
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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