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  1. #include <algorithm>
  2. #include <cassert>
  3. #include <iostream>
  4. #include <string>
  5. #include <vector>
  6.  
  7. template <typename T>
  8. void Combination(const std::vector<T>& v, std::size_t count)
  9. {
  10.     assert(count <= v.size());
  11.     std::vector<bool> bitset(v.size() - count, 0);
  12.     bitset.resize(v.size(), 1);
  13.  
  14.     do {
  15.         for (std::size_t i = 0; i != v.size(); ++i) {
  16.             if (bitset[i]) {
  17.                 std::cout << v[i] << " ";
  18.             }
  19.         }
  20.         std::cout << std::endl;
  21.     } while (std::next_permutation(bitset.begin(), bitset.end()));
  22. }
  23.  
  24. int main() {
  25. 	std::vector<std::string> original {"Brown", "Yellow", "Blue"};
  26.  
  27. 	Combination(original, 2);
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 3432KB
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stdin
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Standard input is empty
stdout
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Yellow Blue 
Brown Blue 
Brown Yellow
https://ideone.com/sHuTg7
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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