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  1. #include <vector>
  2. #include <algorithm>
  3. #include <iostream>
  4.  
  5. const int COL = 2;
  6.  
  7. bool compare_vectors(const std::vector<int>& lhs, const std::vector<int>& rhs)
  8. {
  9.     return rhs.back() < lhs.back();
  10. }
  11.  
  12. int main()
  13. {
  14.     std::vector<std::vector<int>> Arr = {{1, 5},  {2, 8}, {3, 3}};
  15.  
  16.     std::sort(Arr.begin(), Arr.end(), compare_vectors);
  17.  
  18.  
  19. // IDEone still has an outdated compiler, no range loops
  20. //    for(auto& row: Arr)
  21. //    {
  22. //        for(auto& n: row)
  23. //            std::cout << n << ' ';
  24. //        std::cout << '\n';
  25. //    }
  26.     for(std::size_t row = 0; row < Arr.size(); ++row)
  27.     {
  28.         for(std::size_t col = 0; col < Arr[row].size(); ++col)
  29.             std::cout << Arr[row][col] << ' ';
  30.         std::cout << '\n';
  31.     }
  32. }
  33.  
Success #stdin #stdout 0s 3064KB
comments (?)
stdin
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Standard input is empty
stdout
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2 8 
1 5 
3 3
https://ideone.com/ZNQ7G4
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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