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  1. #include <iostream>
  2. #include <map>
  3. #include <tuple>
  4. #include <vector>
  5.  
  6. struct Point2f
  7. {
  8.     Point2f(double x, double y) : x(x), y(y) {}
  9.  
  10.     double x;
  11.     double y;
  12. };
  13.  
  14.  
  15. std::ostream& operator << (std::ostream& os, const Point2f& pt)
  16. {
  17.     return os << "[" << pt.x << ", " << pt.y << "]";
  18. }
  19.  
  20. bool operator < (const Point2f& lhs, const Point2f& rhs)
  21. {
  22.     return std::tie(lhs.x, lhs.y) < std::tie(rhs.x, rhs.y);
  23. }
  24.  
  25. int main()
  26. {
  27.     std::vector<Point2f> points_1, points_2;
  28.  
  29.     points_1.push_back(Point2f(1.0, 2.0));
  30.     points_1.push_back(Point2f(2.0, 2.0));
  31.     points_1.push_back(Point2f(3.0, 2.0));
  32.     points_1.push_back(Point2f(1.0, 2.0));
  33.     points_1.push_back(Point2f(2.0, 2.0));
  34.     points_1.push_back(Point2f(3.0, 2.0));
  35.     points_1.push_back(Point2f(1.0, 2.0));
  36.  
  37.     points_2.push_back(Point2f(1.0, 1.0));
  38.     points_2.push_back(Point2f(1.0, 1.0));
  39.     points_2.push_back(Point2f(1.0, 2.0));
  40.     points_2.push_back(Point2f(1.0, 1.0));
  41.     points_2.push_back(Point2f(1.0, 1.0));
  42.     points_2.push_back(Point2f(1.0, 1.0));
  43.     points_2.push_back(Point2f(1.0, 1.0));
  44.  
  45.     std::vector<std::pair<Point2f, Point2f>> point_pairs;
  46.     for (size_t i = 0; i < points_1.size(); i++) {
  47.         std::cout << points_1[i] << " " << points_2[i] << std::endl;
  48.         point_pairs.push_back(std::make_pair(points_1[i], points_2[i]));
  49.     }
  50.  
  51.     std::cout << "==========\n";
  52.  
  53.     std::map<std::pair<Point2f, Point2f>, int> counts;
  54.  
  55.     for (const auto& p : point_pairs) {
  56.         ++counts[p];
  57.     }
  58.  
  59.     for (const auto& p : counts) {
  60.         const auto& p1 = p.first.first;
  61.         const auto& p2 = p.first.second;
  62.         int count = p.second;
  63.         std::cout << p1 << " " << p2 << " - " << count << " Occurrence(s)\n";
  64.     }
  65.  
  66. }
  67.  
Success #stdin #stdout 0s 16056KB
comments (?)
stdin 
Standard input is empty
stdout 
[1, 2] [1, 1]
[2, 2] [1, 1]
[3, 2] [1, 2]
[1, 2] [1, 1]
[2, 2] [1, 1]
[3, 2] [1, 1]
[1, 2] [1, 1]
==========
[1, 2] [1, 1] - 3 Occurrence(s)
[2, 2] [1, 1] - 2 Occurrence(s)
[3, 2] [1, 1] - 1 Occurrence(s)
[3, 2] [1, 2] - 1 Occurrence(s)
https://ideone.com/VitIbu
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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