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  1. #include <iostream>
  2. #include <sstream>
  3. #include <vector>
  4. #include <algorithm>
  5. #include <iterator>
  6. using namespace std;
  7.  
  8. int main() {
  9. 	vector<int> v1,v2, sim; 
  10. 	stringstream sfs1{"1 2 3 4 5"};
  11. 	stringstream sfs2{"8 4 5 7 1"};
  12.  
  13. 	// read 2 files
  14. 	copy(istream_iterator<int>(sfs1), istream_iterator<int>(), back_inserter(v1));
  15. 	copy(istream_iterator<int>(sfs2), istream_iterator<int>(), back_inserter(v2));
  16.  
  17. 	// make the sequence sorted for set_intersection to work 
  18. 	sort(v1.begin(), v1.end()); 
  19. 	sort(v2.begin(), v2.end()); 
  20.     set_intersection(v1.cbegin(), v1.cend(), v2.cbegin(), v2.cend(), back_inserter(sim));
  21.     cout << "Similar elements: " << sim.size()<<endl; 
  22.     cout << "Similarity coefficient: "<< (double)sim.size()/max(v1.size(), v2.size())*100 <<"%"<<endl;  
  23.  
  24.     cout << "Explanations: "<<endl;
  25. 	cout<<"  File1:"; copy(v1.cbegin(), v1.cend(), ostream_iterator<int>(cout," ")); cout<<endl; 
  26. 	cout<<"  File2:"; copy(v2.cbegin(), v2.cend(), ostream_iterator<int>(cout," ")); cout<<endl; 
  27. 	cout<<"  In common:"; copy(sim.cbegin(), sim.cend(), ostream_iterator<int>(cout," ")); cout<<endl; 
  28.  
  29.  
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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Similar elements: 3
Similarity coefficient: 60%
Explanations: 
  File1:1 2 3 4 5 
  File2:1 4 5 7 8 
  In common:1 4 5
https://ideone.com/5ZBZPi
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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