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  1. #include <iostream>
  2. #include <limits>
  3. #include <type_traits>
  4.  
  5. using namespace std;
  6.  
  7. template<typename Arr>
  8. auto maxValue(const Arr& a) -> typename remove_all_extents<Arr>::type
  9. {
  10.     static_assert(rank<Arr>::value,"[] type only :)");
  11.     using T = typename remove_all_extents<Arr>::type;
  12.     T res = numeric_limits<T>::min();
  13.     if constexpr(rank<Arr>::value == 1)
  14.     {
  15.         for(int i = 0; i < extent<Arr>::value; ++i)
  16.             if (res < a[i]) res = a[i];
  17.     }
  18.     else
  19.     {
  20.         for(int i = 0; i < extent<Arr>::value; ++i)
  21.         {
  22.             T val = maxValue(a[i]);
  23.             if (res < val) res = val;
  24.         }
  25.     }
  26.     return res;
  27. }
  28.  
  29.  
  30. int main(int argc, char * argv[])
  31. {
  32.     int a3[3][2][2] = {
  33.         {{1,2},{3,4}},
  34.         {{5,6},{7,8}},
  35.         {{0,2},{2,4}},
  36.     };
  37.     int a1[5] = { 1, 5, 2, 9, 7 };
  38.  
  39.     cout << maxValue(a3) << endl;
  40.     cout << maxValue(a1) << endl;
  41. }
  42.  
Success #stdin #stdout 0s 4956KB
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https://ideone.com/e6W5Xz
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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