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  1. // g++ -std=c++14 -pedantic -pthread main.cpp
  2. // output: 1 2 3 4 5 1 1 1 
  3. #include <algorithm>
  4. #include <vector>
  5. #include <functional>
  6. #include <iterator>
  7. #include <iostream>
  8.  
  9. int main()
  10. {
  11.   std::vector<int> a = { 1, 2, 3, 2, 4, 5, 1, 1, 3, 5, 1, 5 }, b = { 2, 5, 5, 3 }, c;
  12.  
  13.   std::copy_if(a.begin(), a.end(), std::back_inserter(c), 
  14.     std::bind(std::less<>(),   // this won't work in pre-C++14
  15.       std::bind(
  16.         std::count<std::vector<int>::iterator, int>, 
  17.           std::bind(static_cast<std::vector<int>::iterator (std::vector<int>::*)()>(&std::vector<int>::begin), &c), 
  18.           std::bind(static_cast<std::vector<int>::iterator (std::vector<int>::*)()>(&std::vector<int>::end), &c), 
  19.           std::placeholders::_1
  20.       ),
  21.       std::bind(
  22.         std::minus<>(), // this won't work in pre-C++14
  23.           std::bind(
  24.             std::count<std::vector<int>::iterator, int>, 
  25.               a.begin(), 
  26.               a.end(), 
  27.               std::placeholders::_1
  28.           ),
  29.           std::bind(
  30.             std::count<std::vector<int>::iterator, int>, 
  31.               b.begin(), 
  32.               b.end(), 
  33.               std::placeholders::_1
  34.           )
  35.       )
  36.     )
  37.   );
  38.  
  39.   std::copy(c.begin(), c.end(), std::ostream_iterator<int>(std::cout, " "));
  40.   std::cout << std::endl;
  41. }
Success #stdin #stdout 0s 15232KB
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Standard input is empty
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1 2 3 4 5 1 1 1
https://ideone.com/AHh30L
language:
C++ 4.3.2 (gcc-4.3.2)
created:
7 years ago
visibility:
public

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