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  1. #include <iostream>
  2. #include <set>
  3. #include <iterator>
  4. #include <algorithm>
  5.  
  6. using namespace std;
  7.  
  8. struct myset
  9. {
  10.   set <int> s;
  11.   set <int> :: iterator it;
  12.  
  13.   void insert(int x)
  14.   {
  15.     s.insert(x);
  16.     it = s.begin();
  17.   }
  18.  
  19.   void swap(myset &ms)
  20.   {
  21.     s.swap(ms.s);
  22.     std::swap(it, ms.it);
  23.   }
  24. };
  25.  
  26. int main()
  27. {
  28.   myset a, b;
  29.  
  30.   b.insert(1);
  31.  
  32.   a.swap(b);
  33.  
  34.   return 0;
  35. }
Success #stdin #stdout 0s 4428KB
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https://ideone.com/5l8ku7
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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