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  1. #include <numeric>
  2. #include <vector>
  3. #include <iostream>
  4.  
  5. struct Path
  6. {
  7.     std::vector<double> distance;
  8.     std::vector<double> safety;
  9. };
  10.  
  11. int main()
  12. {
  13.     std::vector<Path> paths{
  14.         {
  15.             { 1.0, 2.0 }, {}
  16.         },
  17.         {
  18.             { 3.0 }, {}
  19.         }
  20.     };
  21.  
  22.     double sum = 0.0;
  23.     for ( auto const& path : paths ) {
  24.         for ( double d : path.distance ) {
  25.             sum += d;
  26.         }
  27.     }
  28.     std::cout << sum << std::endl;
  29.  
  30.     std::cout <<
  31.         std::accumulate(
  32.         paths.begin(),
  33.         paths.end(),
  34.         0,
  35.         [](double res, Path const& path) {
  36.             return res + std::accumulate(path.distance.begin(), path.distance.end(), 0);
  37.         })<<std::endl;
  38.  
  39. }
Success #stdin #stdout 0s 3476KB
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https://ideone.com/mI6NpW
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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