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  1. #include <iostream>
  2. #include <queue>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. class comparator{
  7.     double* query;
  8.     int d;
  9.     public:
  10.         int operator()( double* point1,  double* point2) {
  11.             double dist1 = 0,dist2 = 0;
  12.             for(int i=0;i<d;i++){
  13.                 dist1 += (point1[i] - query[i]) * (point1[i] - query[i]);
  14.                 dist2 += (point2[i] - query[i]) * (point2[i] - query[i]);
  15.             }
  16.             return dist1 < dist2;
  17.         }
  18.  
  19.         comparator(double * query,int d)
  20.         {
  21.             this->query = query;
  22.             this->d = d;
  23.         }
  24. };
  25.  
  26. int main() {
  27.     double query[] = {1.0, 2, 3, 4, 5, 6};
  28.  
  29.     comparator pq_cmp(query, 5);
  30.     priority_queue <double* , vector<double*>, decltype(pq_cmp) > min_heap(pq_cmp);
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 4476KB
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https://ideone.com/Ir2hRR
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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