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  1. #include <vector>
  2. #include <string>
  3.  
  4. #include <algorithm>
  5. #include <functional>
  6. #include <iterator>
  7.  
  8. #include <iostream>
  9.  
  10. // ------------------------------------
  11.  
  12. typedef std::vector<std::string> string_vector;
  13.  
  14. // Functor created by the wizard
  15. struct size_sorter
  16.     : public std::binary_function<std::string, std::string, bool>
  17. {
  18. 	bool operator() (const std::string &left, const std::string &right) const
  19. 	{
  20. 		return (left.size() < right.size());
  21. 	}
  22. };
  23.  
  24. void test_functor_solution(string_vector sv)
  25. {	
  26. 	std::sort(sv.begin(), sv.end(), size_sorter());
  27. 	std::copy(sv.begin(), sv.end(), std::ostream_iterator<std::string>(std::cout, " "));
  28. }
  29.  
  30. // ------------------------------------
  31.  
  32. void test_lambda_solution(string_vector sv)
  33. {
  34. 	// Sort with lambda created by the wizard
  35. 	std::sort(sv.begin(), sv.end(),
  36. 		[] (const std::string &left, const std::string &right) -> bool
  37. 		{
  38. 			return (left.size() < right.size());
  39. 		}
  40. 	);
  41.  
  42. 	std::copy(sv.begin(), sv.end(), std::ostream_iterator<std::string>(std::cout, " "));
  43. }
  44.  
  45. // ------------------------------------
  46.  
  47. int main()
  48. {
  49. 	string_vector test_data;
  50.  
  51. 	test_data.push_back("george");
  52. 	test_data.push_back("nick");
  53. 	test_data.push_back("peter");
  54.  
  55. 	test_functor_solution(test_data);
  56. 	std::cout << std::endl;
  57. 	test_lambda_solution(test_data);
  58.  
  59. 	return 0;
  60. }
Success #stdin #stdout 0s 3036KB
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nick peter george 
nick peter george
https://ideone.com/zUeg8K
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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