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  1. #include <unordered_map>
  2. #include <iostream>
  3. #include <iomanip>
  4.  
  5. int main()
  6. {
  7.     std::unordered_map<int, std::pair<int, int>> m {
  8.         {  1, {  2,  2 } },
  9.         { -3, { 10, -9 } },
  10.         {  8, {  4,  4 } },
  11.     };
  12.  
  13.     auto it = m.find(8);
  14.  
  15.     if (it == m.end()) { it =m.emplace(8, std::make_pair(0, 0)).first; }
  16.  
  17.     ++it->second.first;
  18.  
  19.     for (auto const & p : m)
  20.         std::cout << std::setw(2) << p.first << " => [" << std::setw(2)
  21.                   << p.second.first << " :: " << std::setw(2)
  22.                   << p.second.second << "]\n";
  23. }
  24.  
Success #stdin #stdout 0s 3036KB
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stdin
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Standard input is empty
stdout
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 8 => [ 5 ::  4]
-3 => [10 :: -9]
 1 => [ 2 ::  2]
https://ideone.com/HEmcs0
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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