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  1. #include <vector>
  2. using std::vector;
  3.  
  4. #include <algorithm>
  5. using std::sort;
  6.  
  7. #include <iostream>
  8. using std::cout;
  9.  
  10. class CartesianPoint
  11. {
  12.    private:
  13.       int x;
  14.       int y;
  15.  
  16.    public:
  17.       int getX() const { return x; }
  18.       int getY() const { return y; }
  19.       CartesianPoint(int x, int y) : x(x), y(y) { }
  20.       bool operator< (const CartesianPoint& that) const { return x < that.x; }
  21.  
  22. };
  23.  
  24. int main() 
  25. {
  26.    vector<CartesianPoint> myvector { {10, 13}, {32, 1}, {5, 29}, {12, 6}, {21, 100} };
  27.  
  28.    auto cmpFunc = [](const auto& p1, const auto& p2) { return p1 < p2; };
  29.    sort(myvector.begin(), myvector.end(), cmpFunc); 
  30.  
  31.    cout << "myvector contains:";
  32.  
  33.    for (const auto& point : myvector)
  34.        cout << ' ' << '(' << point.getX() << ',' << point.getY() << ')';
  35.  
  36.    cout << '\n';
  37. }
  38.  
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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myvector contains: (5,29) (10,13) (12,6) (21,100) (32,1)
https://ideone.com/v3fSdV
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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