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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. struct Field2D {
  6.   struct size_type {
  7.      size_t dim1,dim2;
  8.   };
  9.   struct coordinates {
  10.      size_t c1,c2;
  11.   };
  12. Field2D(size_type const & siz) : size_(siz), data_(size_.dim1*size_.dim2) {}
  13. double get(coordinates const & coords) {
  14.   return data_[coords.c1*size_.dim2 + coords.c2];
  15. }
  16. //Other methods
  17. private:
  18.   size_type size_;
  19.   vector<double> data_;
  20. };
  21.  
  22. struct PositionVersusTime : public Field2D {
  23. 	struct size_type { size_t nx, nt; };
  24. 	struct coordinates { size_t x, t; };
  25. 	PositionVersusTime(size_type const & siz) : Field2D({siz.nx, siz.nt}) { }
  26. 	double get(coordinates const & coords) { return Field2D::get({coords.x, coords.t}); }
  27. };
  28.  
  29. int main() {
  30.    PositionVersusTime::size_type siz;
  31.    siz.nx = 5;
  32.    siz.nt = 2;
  33.    PositionVersusTime myField(siz);
  34.    PositionVersusTime::coordinates coords;
  35.    coords.x = 2;
  36.    coords.t = 0;
  37.    auto out = myField.get(coords);
  38.    return 0;
  39. }
Success #stdin #stdout 0s 4540KB
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stdout 
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https://ideone.com/ZpkTbZ
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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