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  1. #include <set>
  2. #include <iostream>
  3.  
  4. class Foo {
  5. public:
  6.     Foo(int v1, int v2) : val1(v1), val2(v2) {};
  7.     bool operator<(const Foo &foo) const { return val2 < foo.val2; }
  8.     int val1;
  9.     int val2;
  10. };
  11.  
  12. int main()
  13. {
  14.     std::multiset<Foo> ms;
  15.     ms.insert(Foo(1, 6));
  16.     ms.insert(Foo(1, 5));
  17.     ms.insert(Foo(3, 4));
  18.     ms.insert(Foo(2, 4));
  19.  
  20.     for (auto const &foo : ms)
  21.         std::cout << foo.val1 << " " << foo.val2 << std::endl;
  22.  
  23.     std::cout << std::endl;
  24.     std::set<Foo> s;
  25.     s.insert(Foo(1, 6));
  26.     s.insert(Foo(1, 5));
  27.     s.insert(Foo(3, 4));
  28.     s.insert(Foo(2, 4));
  29.  
  30.     for (auto const &foo : s)
  31.         std::cout << foo.val1 << " " << foo.val2 << std::endl;
  32.  
  33.     return 0;
  34. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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Standard input is empty
stdout
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3 4
2 4
1 5
1 6

3 4
1 5
1 6
https://ideone.com/qYpalf
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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