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  1. #include <iostream>
  2. #include <map>
  3.  
  4. class Wrapper
  5. {
  6. public:
  7.     Wrapper(std::map<int, std::string>& m, const std::string& s) : m(m), s(s) {}
  8.  
  9.     void operator =(int k) { m[k] = s; }
  10. private:
  11.     std::map<int, std::string>& m;
  12.     std::string s;
  13. };
  14.  
  15. class InvertedMap
  16. {
  17. public:
  18.     Wrapper operator[](const std::string& s) { return {m, s}; }
  19.  
  20.     auto begin() const { return m.begin(); }
  21.     auto end() const { return m.end(); }
  22. private:
  23.     std::map<int, std::string> m;  
  24. };
  25.  
  26.  
  27. int main()
  28. {
  29.    InvertedMap Map1;
  30.    Map1["Ram"] = 8;
  31.    Map1["Aam"] = 8;
  32.    Map1["Some"] = 2;
  33.    Map1["He"] = 5;
  34.    Map1["He"] = 6;
  35.  
  36.     for (const auto& p : Map1) {
  37.         std::cout << p.second << " " << p.first << std::endl;
  38.     }
  39. }
  40.  
Success #stdin #stdout 0s 4524KB
comments (?)
stdin 
Standard input is empty
stdout 
Some 2
He 5
He 6
Aam 8
https://ideone.com/VeX7AS
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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