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  1.  
  2. #include <iostream>
  3. #include <string>
  4. #include<algorithm>
  5. #include<vector>
  6.  
  7.  
  8. using namespace std;
  9.  
  10. // struct comp
  11. // {
  12.  
  13. 	// bool operator()( std::string lhs, std::string rhs)
  14. 	// {
  15. 		// std::transform(lhs.begin(), lhs.end(),lhs.begin(), ::tolower);
  16. 		// std::transform(rhs.begin(), rhs.end(),rhs.begin(), ::tolower);
  17. 		// return lhs < rhs;
  18. 	// }
  19. // };
  20.  
  21. bool char_comp(char lhs, char rhs)
  22. {
  23.     char lhs_lower = std::tolower(lhs);
  24.     char rhs_lower = std::tolower(rhs);
  25.     if (lhs_lower == rhs_lower)
  26.         return rhs > lhs;
  27.     return lhs_lower < rhs_lower;
  28. }
  29.  
  30. bool string_comp(std::string const & lhs, std::string const & rhs)
  31. {
  32.     return std::lexicographical_compare(
  33.         lhs.begin(), lhs.end(), rhs.begin(), rhs.end(),
  34.         char_comp);
  35. }
  36.  
  37.  
  38. int main(){
  39.  
  40.  
  41. std::string str;
  42. std::vector<std::string> v{
  43. "This is a test",
  44. "this is a test",
  45. "Cats",
  46. "cats",
  47. "this thing" };
  48.  
  49.  
  50. std::sort(v.begin(), v.end() , string_comp);
  51.  
  52. for(auto &x: v)
  53. std::cout<<x<<std::endl;
  54. }
  55.  
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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Cats
cats
This is a test
this is a test
this thing
https://ideone.com/TVwSe9
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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