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  1. #include <iostream>
  2. #include <numeric>
  3.  
  4. struct GEOGRAPHIC_REGION
  5. {    
  6.     float fNorthMost;
  7.     float fSouthMost;
  8.     float fWestMost;
  9.     float fEastMost;
  10. };
  11.  
  12. GEOGRAPHIC_REGION combine(const GEOGRAPHIC_REGION& accum, const GEOGRAPHIC_REGION& tocombine)
  13. {
  14.     GEOGRAPHIC_REGION combined = { 
  15.         std::max(accum.fNorthMost, tocombine.fNorthMost),
  16.         std::min(accum.fSouthMost, tocombine.fSouthMost),
  17.         std::min(accum.fWestMost,  tocombine.fWestMost),
  18.         std::max(accum.fEastMost,  tocombine.fEastMost)
  19.     };
  20.     return combined;
  21. }
  22.  
  23. int main()
  24. {
  25.     const GEOGRAPHIC_REGION regions[] = 
  26.     {
  27.         { 2,-1,-1,1 },
  28.         { 1,-2,-1,1 },
  29.         { 1,-1,-2,1 },
  30.         { 1,-1,-1,2 },
  31.     };
  32.  
  33.     GEOGRAPHIC_REGION super = std::accumulate(regions, regions+4, regions[0], combine);
  34.  
  35.     std::cout << "{ " << super.fNorthMost << ", " 
  36.                       << super.fSouthMost << ", "
  37.                       << super.fWestMost << ", "
  38.                       << super.fEastMost << " }" << std::endl;
  39. }
  40.  
Success #stdin #stdout 0s 2724KB
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Standard input is empty
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{ 2, -2, -2, 2 }
https://ideone.com/LQk8U
language:
C++ (gcc 8.3)
created:
14 years ago
visibility:
public

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