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  1. #include <iostream>
  2. #include <string>
  3. #include<algorithm>
  4. #include <map>
  5.  
  6. using namespace std;
  7. int main ()
  8. {
  9.  
  10.  std::multimap<int,std::string> src{
  11.     {1,"dwa"},
  12.     {4,"dwa"},
  13.     {1,"jeden"},
  14.     {2,"jeden"},
  15. 	{5, "piec"}
  16.   };
  17.  
  18.   std::multimap<std::string,int> dst;
  19.  
  20.   std::transform(src.begin(), src.end(), std::inserter(dst, dst.begin()), 
  21.                            [] (const std::pair<int,std::string> &p) {
  22.                            return std::pair<std::string,int>(p.second, p.first);
  23.  
  24.                            }
  25.                          );
  26.  
  27.  
  28.  
  29. std::multimap<std::string,int>::iterator it = dst.begin();
  30.  
  31.  for(int count = 0;it !=dst.end();++it,++count)
  32.    std::cout<<it->first<<" "<<it->second<<std::endl;
  33.  
  34.  
  35. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
dwa 1
dwa 4
jeden 1
jeden 2
piec 5
https://ideone.com/0hN7lv
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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