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  1. #include <iostream>
  2. #include <map>
  3. using namespace std;
  4.  
  5. int main() {
  6.     map<int,int> col1 { {4,1},{6,2},{8,4}, {10,6}};
  7.     map<int,int> col2 { {5,1},{9,2},{4,4},{10,6}};
  8.     map<int,pair<int,int>> common ; 
  9.  
  10.     for (auto& x: col1) {
  11.      	auto y= col2.find(x.first); 
  12.     	if (y!=col2.end()) 
  13.     	    common[x.first]=make_pair(x.second,y->second);
  14.     }
  15.     cout<<"Result:"<<endl;
  16.     for (auto& x:common ) 
  17.         cout << x.first << "<-" << x.second.first << " in col1 and " <<x.second.second << " in col2"<<endl;
  18.     return 0;
  19. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
Result:
4<-1 in col1 and 4 in col2
10<-6 in col1 and 6 in col2
https://ideone.com/cLgfoG
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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