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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. bool less_than(int a, int b) { return a <b;}
  5. int main()
  6. {
  7. 	std::vector<std::vector<double>> vector1 = {{4,3,5,3}, 
  8.                                                 {2,6,3,7}, 
  9.                                                 {6,8,5,1}, 
  10.                                                 {5,6,1,5}};
  11.  
  12.         int i = 3;                                       
  13.     std::sort(vector1.begin(),
  14.               vector1.end(),
  15.               [i] (const std::vector<double> &a, const std::vector<double> &b)
  16.               {
  17.                   return less_than(a[i] , b[i]);
  18.               });
  19.  
  20.     for (auto &r : vector1)
  21.     {
  22.     	for (auto e : r)
  23.     		std::cout << e << " ";
  24.     	std::cout << std::endl;
  25.     }
  26.  
  27. 	return 0;
  28. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
Standard input is empty
stdout 
6 8 5 1 
4 3 5 3 
5 6 1 5 
2 6 3 7
https://ideone.com/1XzRDu
language:
C++ (gcc 8.3)
created:
8 hours ago
visibility:
public

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